Opening about crashes the app

[mueller-ma]

Process: com.github.muellerma.tabletoptools.debug, PID: 13533
  java.lang.IllegalArgumentException: The fragment LibsSupportFragment{d464784} (9458c49e-5001-4143-923c-50ae05bd816a id=0x7f090162 tag=about) is unknown to the FragmentNavigator. Please use the navigate() function to add fragments to the FragmentNavigator managed FragmentManager.
  	at androidx.navigation.fragment.FragmentNavigator$onAttach$2.onBackStackChangeCommitted(FragmentNavigator.kt:199)
  	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1918)
  	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1845)
  	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1782)
  	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:565)
  	at android.os.Handler.handleCallback(Handler.java:958)
  	at android.os.Handler.dispatchMessage(Handler.java:99)
  	at android.os.Looper.loopOnce(Looper.java:205)
  	at android.os.Looper.loop(Looper.java:294)
  	at android.app.ActivityThread.main(ActivityThread.java:8177)
  	at java.lang.reflect.Method.invoke(Native Method)
  	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
  	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)