UE4： ERROR: cmd.exe failed with

 FAILURE: Build failed with an exception.
UATHelper: Packaging (Android (ETC2)):   
UATHelper: Packaging (Android (ETC2)):   * What went wrong:
UATHelper: Packaging (Android (ETC2)):   Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
UATHelper: Packaging (Android (ETC2)):   > Installed Build Tools revision 31.0.0 is corrupted. Remove and install again using the SDK Manager.
UATHelper: Packaging (Android (ETC2)):   
UATHelper: Packaging (Android (ETC2)):   * Try:
UATHelper: Packaging (Android (ETC2)):   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.
UATHelper: Packaging (Android (ETC2)):   
UATHelper: Packaging (Android (ETC2)):   * Get more help at https://help.gradle.org
UATHelper: Packaging (Android (ETC2)):   
UATHelper: Packaging (Android (ETC2)):   BUILD FAILED in 6s
UATHelper: Packaging (Android (ETC2)):   ERROR: cmd.exe failed with args /c "E:\UEProject\CarConfExample\Intermediate\Android\armv7\gradle\rungradle.bat" :app:assembleDebug
PackagingResults: Error: cmd.exe failed with args /c "E:\UEProject\CarConfExample\Intermediate\Android\armv7\gradle\rungradle.bat" :app:assembleDebug
UATHelper: Packaging (Android (ETC2)): Took 8.7938199s to run UnrealBuildTool.exe, ExitCode=6
UATHelper: Packaging (Android (ETC2)): UnrealBuildTool failed. See log for more details. (C:\Users\lichao\AppData\Roaming\Unreal Engine\AutomationTool\Logs\D+UE_4.26\UBT-CarConfExample-Android-Development.txt)
UATHelper: Packaging (Android (ETC2)): AutomationTool exiting with ExitCode=6 (6)
UATHelper: Packaging (Android (ETC2)): BUILD FAILED
PackagingResults: Error: Unknown Error

解决方法：