2020-02-12 21:03:12.057 17727-17727/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: org.secuso.privacyfriendlysolitaire, PID: 17727
java.lang.IllegalStateException: Fragment org.secuso.privacyfriendlysolitaire.Activities.Solitaire.WonDialog must be a public static class to be properly recreated from instance state.
at android.app.BackStackRecord.doAddOp(BackStackRecord.java:429)
at android.app.BackStackRecord.add(BackStackRecord.java:409)
at android.app.DialogFragment.show(DialogFragment.java:229)
at org.secuso.privacyfriendlysolitaire.Activities.Solitaire.alertBoxWonMessage(Solitaire.java:334)
at org.secuso.privacyfriendlysolitaire.Activities.Solitaire$7.run(Solitaire.java:486)
at android.os.Handler.handleCallback(Handler.java:869)
at android.os.Handler.dispatchMessage(Handler.java:101)
at android.os.Looper.loop(Looper.java:206)
at android.app.ActivityThread.main(ActivityThread.java:6784)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:852)
Here is a logcat capture