在将我的Flutter升级到Channel beta v0.10.2之后，当我按F5键构建并在模拟器上运行时出现了错误，这是什么问题？
Launching lib\main.dart on Android SDK built for x86 in debug mode...
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_launch-0.1.2\android\src\main\kotlin\com\example\flutterlaunch\FlutterLaunchPlugin.kt: (33, 42): Type inference failed. Expected type mismatch: inferred type is String? but String was expected
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_launch-0.1.2\android\src\main\kotlin\com\example\flutterlaunch\FlutterLaunchPlugin.kt: (34, 44): Type inference failed. Expected type mismatch: inferred type is String? but String was expected
e: C:\flutter\.pub-cache\hosted\pub.dartlang.org\flutter_launch-0.1.2\android\src\main\kotlin\com\example\flutterlaunch\FlutterLaunchPlugin.kt: (50, 40): Type inference failed. Expected type mismatch: inferred type is String? but String was expected
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':flutter_launch:compileDebugKotlin'.
> Compilation error. See log for more details
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 6s
Gradle task assembleDebug failed with exit code 1
Exited (sigterm)
颤抖的医生：
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel beta, v0.10.2, on Microsoft Windows [Version 10.0.17134.345], locale en-ID)
[√] Android toolchain - develop for Android devices (Android SDK 28.0.3)
[√] Android Studio (version 3.2)
[√] VS Code (version 1.28.2)
[√] Connected device (1 available)
• No issues found!