Just a side note, with the latest C3 beta build, All Android 12 users will Crash with this error,
Fatal Exception: java.lang.IllegalArgumentException:Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
In Android Studio
The working fix to this is to add to the Build.Gradle(Module:) File in Dependencies
implementation "androidx.work:work-runtime:2.7.1"
Seems to fix it for me, for now.