Kotlin and Android Development featuring Jetpack: End Ch. 11 app runs but consistently crashes

I’ve got to the end of Ch. 11, and the app runs, with all tabs displaying what they should – at first. After switching around between Standings, Players, Leaders, etc., the app always eventually has problems reloading, for instance, Standings. Then, I’ll try to load Leaders, and it crashes with this error (as far as I can tell, it’s always mentioning the LeadersListFragment). Is this due to the “experimental” status of some of the packages imported, or is it something else? It happens on both my Samsung tablet and on the virtual Pixel 3a.

FATAL EXCEPTION: main
                                                                                                    Process: com.example.abl, PID: 13592
                                                                                                    androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.example.abl.leaders.LeadersListFragment: could not find Fragment constructor
                                                                                                    	at androidx.fragment.app.Fragment.instantiate(Fragment.java:687)
                                                                                                    	at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
                                                                                                    	at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:525)
                                                                                                    	at androidx.fragment.app.FragmentState.instantiate(FragmentState.java:84)
                                                                                                    	at androidx.fragment.app.FragmentStateManager.<init>(FragmentStateManager.java:91)
                                                                                                    	at androidx.fragment.app.FragmentManager.restoreSaveStateInternal(FragmentManager.java:2562)
                                                                                                    	at androidx.fragment.app.Fragment.restoreChildFragmentState(Fragment.java:1988)
                                                                                                    	at androidx.fragment.app.Fragment.onCreate(Fragment.java:1967)
                                                                                                    	at androidx.fragment.app.Fragment.performCreate(Fragment.java:3094)
                                                                                                    	at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:504)
                                                                                                    	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:268)
                                                                                                    	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1943)
                                                                                                    	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1845)
                                                                                                    	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1782)
                                                                                                    	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:565)
                                                                                                    	at android.os.Handler.handleCallback(Handler.java:938)
                                                                                                    	at android.os.Handler.dispatchMessage(Handler.java:99)
                                                                                                    	at android.os.Looper.loop(Looper.java:246)
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:8653)
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
                                                                                                    Caused by: java.lang.NoSuchMethodException: com.example.abl.leaders.LeadersListFragment.<init> []
                                                                                                    	at java.lang.Class.getConstructor0(Class.java:2332)
                                                                                                    	at java.lang.Class.getConstructor(Class.java:1728)
                                                                                                    	at androidx.fragment.app.Fragment.instantiate(Fragment.java:672)
                                                                                                    	at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57) 
                                                                                                    	at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:525) 
                                                                                                    	at androidx.fragment.app.FragmentState.instantiate(FragmentState.java:84) 
                                                                                                    	at androidx.fragment.app.FragmentStateManager.<init>(FragmentStateManager.java:91) 
                                                                                                    	at androidx.fragment.app.FragmentManager.restoreSaveStateInternal(FragmentManager.java:2562) 
                                                                                                    	at androidx.fragment.app.Fragment.restoreChildFragmentState(Fragment.java:1988) 
                                                                                                    	at androidx.fragment.app.Fragment.onCreate(Fragment.java:1967) 
                                                                                                    	at androidx.fragment.app.Fragment.performCreate(Fragment.java:3094) 
                                                                                                    	at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:504) 
                                                                                                    	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:268) 
                                                                                                    	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1943) 
                                                                                                    	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1845) 
                                                                                                    	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1782) 
                                                                                                    	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:565) 
                                                                                                    	at android.os.Handler.handleCallback(Handler.java:938) 
                                                                                                    	at android.os.Handler.dispatchMessage(Handler.java:99) 
                                                                                                    	at android.os.Looper.loop(Looper.java:246) 
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:8653) 
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method) 
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602) 
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130) 
2023-12-06 14:58:29.915 13592-13592 Process                 com.example.abl                      I  Sending signal. PID: 13592 SIG: 9