Flutter : Could not build the precompiled application for the device. Error launching application on iPhone

I can't run my flutter project on an IOS device.

This is what I got after flutter run. I can't understand why. Please have a look at the error below and tell me how to fix this.

Launching lib/main.dart on iPhone in debug mode...
Automatically signing iOS for device deployment using specified development team
in Xcode project: L24VC6F98D
Running Xcode build...                                                  
Xcode build done.                                            8,2s
Failed to build iOS app
Error output from Xcode build:
↳
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/Models/TOActivityCroppedImageProvider.h"
    is a member of multiple groups ("TOCropViewController" and
    "TOCropViewController"); this indicates a malformed project.  Only the
    membership in one of the groups will be preserved (but membership in targets
    will be unaffected).  If you want a reference to the same file in more than
    one group, please add another reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/Views/TOCropOverlayView.h" is a member
    of multiple groups ("TOCropViewController" and "TOCropViewController"); this
    indicates a malformed project.  Only the membership in one of the groups will
    be preserved (but membership in targets will be unaffected).  If you want a
    reference to the same file in more than one group, please add another
    reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/Models/TOCroppedImageAttributes.h" is a
    member of multiple groups ("TOCropViewController" and "TOCropViewController");
    this indicates a malformed project.  Only the membership in one of the groups
    will be preserved (but membership in targets will be unaffected).  If you want
    a reference to the same file in more than one group, please add another
    reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/Views/TOCropScrollView.h" is a member of
    multiple groups ("TOCropViewController" and "TOCropViewController"); this
    indicates a malformed project.  Only the membership in one of the groups will
    be preserved (but membership in targets will be unaffected).  If you want a
    reference to the same file in more than one group, please add another
    reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/Views/TOCropToolbar.h" is a member of
    multiple groups ("TOCropViewController" and "TOCropViewController"); this
    indicates a malformed project.  Only the membership in one of the groups will
    be preserved (but membership in targets will be unaffected).  If you want a
    reference to the same file in more than one group, please add another
    reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/Views/TOCropView.h" is a member of
    multiple groups ("TOCropViewController" and "TOCropViewController"); this
    indicates a malformed project.  Only the membership in one of the groups will
    be preserved (but membership in targets will be unaffected).  If you want a
    reference to the same file in more than one group, please add another
    reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for "Objective-C/TOCropViewController/TOCropViewController.h" is a member of
    multiple groups ("TOCropViewController" and "TOCropViewController"); this
    indicates a malformed project.  Only the membership in one of the groups will
    be preserved (but membership in targets will be unaffected).  If you want a
    reference to the same file in more than one group, please add another
    reference to the same path.
    2020-09-18 11:56:14.934 xcodebuild[29414:155421] warning:  The file reference
    for
    "Objective-C/TOCropViewController/Models/TOCropViewControllerTransitioning.h"
    is a member of multiple groups ("TOCropViewController" and
    "TOCropViewController"); this indicates a malformed project.  Only the
    membership in one of the groups will be preserved (but membership in targets
    will be unaffected).  If you want a reference to the same file in more than
    one group, please add another reference to the same path.
    2020-09-18 11:56:14.978 xcodebuild[29414:155477]  DTDeviceKit: deviceType from
    d94358f0937915cc1dbf618d6c7be90be0612766 was NULL
    2020-09-18 11:56:15.129 xcodebuild[29414:155486]  DTDeviceKit: deviceType from
    d94358f0937915cc1dbf618d6c7be90be0612766 was NULL
    2020-09-18 11:56:15.129 xcodebuild[29414:155486]  DTDeviceKit: deviceType from
    d94358f0937915cc1dbf618d6c7be90be0612766 was NULL
    ** BUILD FAILED **


Xcode's output:
↳
    Command CompileSwift failed with a nonzero exit code
    /Users/punreachrany/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/kakao
    _flutter_sdk-0.4.2/ios/Classes/SwiftKakaoFlutterSdkPlugin.swift:103:82: error:
    cannot convert value of type 'Error' to specified type
    'ASWebAuthenticationSessionError.Code'
                        if case ASWebAuthenticationSessionError.Code.canceledLogin
                        = err {
                                                                                     ^~~
    /Users/punreachrany/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/kakao
    _flutter_sdk-0.4.2/ios/Classes/SwiftKakaoFlutterSdkPlugin.swift:108:72: error:
    cannot convert value of type 'Error' to specified type
    'SFAuthenticationError.Code'
                        if case SFAuthenticationError.Code.canceledLogin = err {
                                                                           ^~~
    Command CompileSwift failed with a nonzero exit code
    Command CompileSwift failed with a nonzero exit code
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Constructing build description
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'shared_preferences' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'path_provider' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'onesignal_flutter' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'leveldb-library' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'image_picker' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'abseil' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'package_info' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'esys_flutter_share' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'PromisesObjC' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'TOCropViewController-TOCropViewControllerBundle' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Models/TOActivityCroppedImageProvider.h (in
    target 'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Views/TOCropOverlayView.h (in target
    'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Models/TOCroppedImageAttributes.h (in target
    'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Views/TOCropScrollView.h (in target
    'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Views/TOCropToolbar.h (in target
    'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Views/TOCropView.h (in target
    'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/TOCropViewController.h (in target
    'TOCropViewController' from project 'Pods')
    warning: Skipping duplicate build file in Copy Headers build phase:
    /Users/punreachrany/Desktop/Flutter/PhotoEarn/ios/Pods/TOCropViewController/Ob
    jective-C/TOCropViewController/Models/TOCropViewControllerTransitioning.h (in
    target 'TOCropViewController' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'nanopb' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'gRPC-C++-gRPCCertificates-Cpp' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'GoogleDataTransport' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'GTMSessionFetcher' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FBSDKCoreKit' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'BoringSSL-GRPC' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'BSImageView' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'BSGridCollectionViewLayout' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'GoogleUtilities' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'GoogleDataTransportCCTSupport' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FBSDKLoginKit' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'image_cropper' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'GoogleAppMeasurement' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'gRPC-C++' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'OneSignal-iOS10.0' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'Flutter' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'gRPC-Core' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseFirestore' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseAuthInterop' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'firebase_auth' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseCore' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'firebase_core' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'firebase_database' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'cloud_firestore' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseAnalytics' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseInstallations' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseCoreDiagnosticsInterop' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseAuth' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseDatabase' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'OneSignal-iOS11.0' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseStorage' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'FirebaseCoreDiagnostics' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'firebase_storage' from project 'Pods')
    warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0,
    but the range of supported deployment target versions is 9.0 to 14.0.99. (in
    target 'Firebase' from project 'Pods')

Could not build the precompiled application for the device.

Error launching application on iPhone.

What can I do to fix this problem? Please give me a command line or sth. Please help me. I am looking forward to hearing from you. Thank you.

If you want to simulate it immediately rather than taking care of the IDE issue generally, go to Tools -> Flutter -> Open iOS module in Xcode. But for a further solution, do a Flutter Clean, and remove the simulator from Xcode -> Window -> Devices and Simulators -> Simulators -> right click on your iOS simulator and click delete. Then add a new simulator from the bottom left corner “+” button in the same Devices and Simulators page you are on. Re run your app in flutter and it should be working.

What worked for me was a combination of 4 steps:

Step 1, modify Podfile

# Uncomment this line to define a global platform for your project
platform :ios, '12.1'

and add the following (iOS platform must match):

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.1'
    end
  end
end

Step 2, switch Flutter channel to master and upgrade Flutter

$ flutter channel master
$ flutter upgrade

Step 3, Upgrade dependencies

$ flutter pub upgrade

Step 4, clean and build

$ flutter clean
$ flutter build ios