I'm working on multi-flavor android app After updating the Android Gradle plugin to the 7.0.2 version (from '4.1.1') to access a new variant API, I get the following error during the app build:

FAILURE: Build failed with an exception.

* What went wrong:
Some problems were found with the configuration of task ':app:injectCrashlyticsMappingFileIdRandstadAccDebug' (type 'InjectMappingFileIdTask').
- Type 'com.google.firebase.crashlytics.buildtools.gradle.tasks.InjectMappingFileIdTask' property 'mappingFileId' of mutable type 'org.gradle.api.provider.Property' is writable.

Reason: Properties of type 'org.gradle.api.provider.Property' are already mutable.

Possible solution: Remove the 'setMappingFileId' method.

Please refer to https://docs.gradle.org/7.0.2/userguide/validation_problems.html#mutable_type_with_setter for more details about this problem.
- Type 'com.google.firebase.crashlytics.buildtools.gradle.tasks.InjectMappingFileIdTask' property 'resourceFile' of mutable type 'org.gradle.api.file.RegularFileProperty' is writable.

Reason: Properties of type 'org.gradle.api.file.RegularFileProperty' are already mutable.

Possible solution: Remove the 'setResourceFile' method.

Please refer to https://docs.gradle.org/7.0.2/userguide/validation_problems.html#mutable_type_with_setter for more details about this problem.

* Try:
Run with --stacktrace option to get the stack trace.  Run with --scan to get full insights.

* Get more help at https://help.gradle.org

I'm using the latest version of firebase BOM 28.4.1.

Is there any walkaround for this?

CodePudding user response：

In my case, the fix was to update the crashlytics plugin to the current newest version: 2.7.1