Приложение Flutter не запускается после обновления флаттера

Пожалуйста, помогите мне! Приложение было близко к завершению, и, поскольку я запустил обновление флаттера, чтобы исправить ошибку, мне пришлось запустить: флаттер очистить мастер канала флаттера флаттер обновить флаттер запустить

и теперь он больше не запускается, и появляется следующий код..

Launching lib/main.dart on iPhone 12 Pro Max in debug mode...
Running Xcode build...
Xcode build done.                                           42,0s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **


Xcode's output:
↳
    In file included from /Users/patrickmeyer/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.5.12+4/ios/Classes/FLTSharedPreferencesPlugin.m:5:
    /Users/patrickmeyer/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/shared_preferences-0.5.12+4/ios/Classes/FLTSharedPreferencesPlugin.h:5:9: fatal error: 'Flutter/Flutter.h' file not found
    #import <Flutter/Flutter.h>
            ^~~~~~~~~~~~~~~~~~~
    1 error generated.
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Constructing build description
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'share' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'GoogleDataTransport' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'shared_preferences' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'Firebase' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'GoogleUtilities' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'GoogleAppMeasurement' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'firebase_core' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'FirebaseCore' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'FirebaseCoreDiagnostics' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'firebase_admob' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 4.3, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'nanopb' from project 'Pods')
    warning: The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.3.99. (in target 'Flutter' from project 'Pods')

Could not build the application for the simulator.
Error launching application on iPhone 12 Pro Max.

Флаттер-доктор выглядит нормально...

[✓] Flutter (стабильный канал, 1.22.5, в Mac OS X 10.15.7 19H114 darwin-x64, регион de-DE) • Flutter версии 1.22.5 в /Users/patrickmeyer/Developer/flutter. • Версия платформы 7891006299 (13 дней назад), 10.12.2020 11:54:40 -0800 • Версия двигателя ae90085a84 • Дартс версии 2.10.4

[✓] Набор инструментов Android — разработка для устройств Android (Android SDK версии 29.0.3) • Android SDK в /Users/patrickmeyer/Library/Android/sdk. • Платформа android-29, инструменты сборки 29.0.3 • Двоичный файл Java по адресу: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java • Java-версия OpenJDK Runtime Environment (сборка 1.8.0_242-релиз-1644-b3-6915495) • Принимаются все лицензии Android.

[✓] Xcode — разработка для iOS и macOS (Xcode 12.3) • Xcode в /Applications/Xcode.app/Contents/Developer. • Xcode 12.3, версия сборки 12C33. • CocoaPods версии 1.10.0

[✓] Android Studio (версия 4.1) • Android Studio по адресу /Applications/Android Studio.app/Contents. • Установлен плагин Flutter • Версия плагина Dart 201.9306. • Java-версия OpenJDK Runtime Environment (сборка 1.8.0_242-релиз-1644-b3-6915495)

[✓] Подключенное устройство (доступно 1) • iPhone 12 Pro Max (мобильный) • 11ACA273-A0C3-405D-993A-A9AF9057887C • iOS • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (симулятор)

• Проблем не обнаружено!