Warning: there were 12 unresolved references to classes or interfaces.

         You may need to add missing library jars or update their versions.

         If your code works fine without the missing classes, you can suppress

         the warnings with '-dontwarn' options.

         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)

Warning: there were 2 unresolved references to library class members.

         You probably need to update the library versions.

         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedlibraryclassmember)

FAILURE: Build failed with an exception.

* What went wrong:

Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.

> Job failed, see logs for 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 5m 35s

Running Gradle task 'assembleRelease'...

Running Gradle task 'assembleRelease'... Done                     337.9s (!)

*******************************************************************************************

The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.

See https://goo.gl/CP92wY for more information on the problem and how to fix it.

*******************************************************************************************

Gradle task assembleRelease failed with exit code 1