Execution failed for task ':flutter_cast_video:compileReleaseKotlin'

andyuzor@Olumurphys-MacBook-Pro YourAppName % flutter build apk

Font asset "CupertinoIcons.ttf" was tree-shaken, reducing it from 257628 to 1752 bytes (99.3% reduction). Tree-shaking can be disabled by providing the --no-tree-shake-icons flag when building your app.

Font asset "MaterialIcons-Regular.otf" was tree-shaken, reducing it from 1645184 to 4044 bytes (99.8% reduction). Tree-shaking can be disabled by providing the --no-tree-shake-icons flag when building your app.

warning: [options] source value 8 is obsolete and will be removed in a future release

warning: [options] target value 8 is obsolete and will be removed in a future release

warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.

3 warnings

warning: [options] source value 8 is obsolete and will be removed in a future release

warning: [options] target value 8 is obsolete and will be removed in a future release

warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.

Note: Some input files use or override a deprecated API.

Note: Recompile with -Xlint:deprecation for details.

3 warnings

warning: [options] source value 8 is obsolete and will be removed in a future release

warning: [options] target value 8 is obsolete and will be removed in a future release

warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.

3 warnings

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':flutter_cast_video:compileReleaseKotlin'.

> Inconsistent JVM-target compatibility detected for tasks 'compileReleaseJavaWithJavac' (1.8) and 'compileReleaseKotlin' (21).

  Consider using JVM Toolchain: https://kotl.in/gradle/jvm/toolchain

  Learn more about JVM-target validation: https://kotl.in/gradle/jvm/target-validation 

* 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 1m 8s

Running Gradle task 'assembleRelease'...                           69.5s

Gradle task assembleRelease failed with exit code 1

Please help see to the error bolded above I have been on it for over 3days now!

The error is to build debug apk.