Unsure of how to fix this Flutter error. nb_utils issue - xcode

Question

I have been running into this same issue for the past several days while trying to build on iOS. I have tried a ton of different supposed solutions online but nothing has worked. If anyone has run into this issue recently and knows how to fix it please let me know. Any and all help would be much appreciated and thank you in advance. Below is the error output, flutter doctor output, flutter version, Xcode version, and my podfile. Please also let me know if there is any other information I can provide to help.
ERROR OUTPUT
Launching lib/main.dart on iPhone 14 Pro Max in debug mode...
Running pod install...
Running Xcode build...
Xcode build done. 45.9s
Failed to build iOS app
Error output from Xcode build:
↳
** BUILD FAILED **
Xcode's output:
↳
Writing result bundle at path:
/var/folders/9r/ww9pfkld2rz5fggbg7tysf0c0000gn/T/flutter_tools.a2Y2jQ/flutter_ios_build_temp_diriIb8LW/temporary_xcresult_bundle
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/nb_utils.dart:180:50: Error: The argument type 'Duration?' can't be assigned to the parameter type 'Duration' because 'Duration?' is nullable and 'Duration' isn't.
- 'Duration' is from 'dart:core'.
buildPageRoute(widget, pageRouteAnimation, duration),
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/nb_utils.dart:185:50: Error: The argument type 'Duration?' can't be assigned to the parameter type 'Duration' because 'Duration?' is nullable and 'Duration' isn't.
- 'Duration' is from 'dart:core'.
buildPageRoute(widget, pageRouteAnimation, duration),
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:67:20: Error: The argument type 'Duration?' can't be assigned to the parameter type 'Duration' because 'Duration?' is nullable and 'Duration' isn't.
- 'Duration' is from 'dart:core'.
toastDuration: duration,
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:199:20: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
- 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/scheduler/binding.dart').
SchedulerBinding.instance!.addPostFrameCallback((_) => onCreated?.call());
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:275:29: Warning: Operand of null-aware operation '??' has type 'Duration' which excludes null.
- 'Duration' is from 'dart:core'.
transitionDuration: duration ?? 1000.milliseconds,
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:282:29: Warning: Operand of null-aware operation '??' has type 'Duration' which excludes null.
- 'Duration' is from 'dart:core'.
transitionDuration: duration ?? 700.milliseconds,
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:289:29: Warning: Operand of null-aware operation '??' has type 'Duration' which excludes null.
- 'Duration' is from 'dart:core'.
transitionDuration: duration ?? 700.milliseconds,
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:299:29: Warning: Operand of null-aware operation '??' has type 'Duration' which excludes null.
- 'Duration' is from 'dart:core'.
transitionDuration: duration ?? 500.milliseconds,
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/common.dart:309:29: Warning: Operand of null-aware operation '??' has type 'Duration' which excludes null.
- 'Duration' is from 'dart:core'.
transitionDuration: duration ?? 500.milliseconds,
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/extensions/widget_extensions.dart:267:51: Error: The argument type 'Duration?' can't be assigned to the parameter type 'Duration' because 'Duration?' is nullable and 'Duration' isn't.
- 'Duration' is from 'dart:core'.
buildPageRoute(this!, pageRouteAnimation, duration),
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/extensions/widget_extensions.dart:272:51: Error: The argument type 'Duration?' can't be assigned to the parameter type 'Duration' because 'Duration?' is nullable and 'Duration' isn't.
- 'Duration' is from 'dart:core'.
buildPageRoute(this!, pageRouteAnimation, duration),
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/utils/after_layout.dart:11:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance!
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/widgets/OverlayCustomWidget.dart:59:22: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance!.addPostFrameCallback((_) => showOverlay());
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/widgets/OverlayCustomWidget.dart:66:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance!
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/widgets/OverlayCustomWidget.dart:73:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance!
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/widgets/TimerWidget.dart:41:20: Warning: Operand of null-aware operation '?.' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance?.addObserver(this);
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/nb_utils-4.4.12/lib/src/widgets/TimerWidget.dart:56:20: Warning: Operand of null-aware operation '?.' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../Developer/flutter/packages/flutter/lib/src/widgets/binding.dart').
WidgetsBinding.instance?.removeObserver(this);
^
../../Developer/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker-1.5.1/lib/flutter_datetime_picker.dart:311:32: Warning: Operand of null-aware operation '??' has type 'Color' which excludes null.
- 'Color' is from 'dart:ui'.
color: theme.backgroundColor ?? Colors.white,
^
Failed to package /Users/ryannapolitano/Desktop/Skape/ios/...
Command PhaseScriptExecution failed with a nonzero exit code
note: Building targets in dependency order
warning: Run script build phase 'Create Symlinks to Header Folders' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'BoringSSL-GRPC' from project 'Pods')
warning: Run script build phase 'Create Symlinks to Header Folders' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Libuv-gRPC' from project 'Pods')
warning: Run script build phase 'Create Symlinks to Header Folders' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'abseil' from project 'Pods')
warning: Run script build phase 'Create Symlinks to Header Folders' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'gRPC-Core' from project 'Pods')
warning: Run script build phase 'Create Symlinks to Header Folders' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'gRPC-C++' from project 'Pods')
warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Runner' from project 'Runner')
warning: Run script build phase 'Thin Binary' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Runner' from project 'Runner')
note: Run script build phase '[CP] Copy Pods Resources' will be run during every build because the option to run the script phase "Based on dependency analysis" is unchecked. (in target 'Runner' from project 'Runner')
note: Run script build phase '[CP] Embed Pods Frameworks' will be run during every build because the option to run the script phase "Based on dependency analysis" is unchecked. (in target 'Runner' from project 'Runner')
Result bundle written to path:
/var/folders/9r/ww9pfkld2rz5fggbg7tysf0c0000gn/T/flutter_tools.a2Y2jQ/flutter_ios_build_temp_diriIb8LW/temporary_xcresult_bundle
Could not build the application for the simulator.
Error launching application on iPhone 14 Pro Max.
FLUTTER DOCTOR OUTPUT
[✓] Flutter (Channel stable, 3.0.5, on macOS 13.0.1 22A400 darwin-x64, locale en-US)
• Flutter version 3.0.5 at /Users/ryannapolitano/Developer/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision f1875d570e (6 months ago), 2022-07-13 11:24:16 -0700
• Engine revision e85ea0e79c
• Dart version 2.17.6
• DevTools version 2.12.2
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
• Android SDK at /Users/ryannapolitano/Library/Android/sdk
• Platform android-33-ext4, build-tools 33.0.1
• Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 14.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• CocoaPods version 1.11.3
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2021.3)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
[✓] Connected device (3 available)
• iPhone 14 Pro Max (mobile) • A53BC5BD-D103-44D5-BC9A-E1CA0ECFDD15 • ios • com.apple.CoreSimulator.SimRuntime.iOS-16-2 (simulator)
• macOS (desktop) • macos • darwin-x64 • macOS 13.0.1 22A400 darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 109.0.5414.87
[✓] HTTP Host Availability
• All required HTTP hosts are available
• No issues found!
FLUTTER VERSION
Flutter 3.0.5 • channel stable • https://github.com/flutter/flutter.git
Framework • revision f1875d570e (6 months ago) • 2022-07-13 11:24:16 -0700
Engine • revision e85ea0e79c
Tools • Dart 2.17.6 • DevTools 2.12.2
XCODE VERSION
Version 14.2 (14C18)
PODFILE
platform :ios, '12.0'
ENV['COCOAPODS_DISABLE_STATS'] = 'true'
project 'Runner', {
'Debug' => :debug,
'Profile' => :release,
'Release' => :release,
}
def flutter_root
generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
unless File.exist?(generated_xcode_build_settings_path)
raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
end
File.foreach(generated_xcode_build_settings_path) do |line|
matches = line.match(/FLUTTER_ROOT\=(.*)/)
return matches[1].strip if matches
end
raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end
require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
flutter_ios_podfile_setup
target 'Runner' do
use_frameworks!
use_modular_headers!
flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end
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['ENABLE_BITCODE'] = 'NO'
config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
config.build_settings['EXCLUDED_ARCHS[sdk=iphonesimulator*]'] = 'arm64'
end
end
end