It was reported, sent a first solution in v4.2.1 but unfortunately, it didn't work and there are still appearances.
It might need another look
Exception java.lang.NullPointerException:
at com.owncloud.android.datamodel.FileDataStorageManager.<init>
at com.owncloud.android.ui.activity.BaseActivity.getStorageManager (BaseActivity.java:216)
at com.owncloud.android.ui.activity.FileDisplayActivity.navigateTo (FileDisplayActivity.kt:1634)
at com.owncloud.android.ui.activity.FileDisplayActivity.navigateTo$default (FileDisplayActivity.kt:1610)
at com.owncloud.android.ui.activity.FileDisplayActivity.navigateToOption (FileDisplayActivity.kt:1661)
at com.owncloud.android.ui.activity.DrawerActivity.bottomBarNavigationTo (DrawerActivity.kt:278)
at com.owncloud.android.ui.activity.DrawerActivity.setupNavigationBottomBar$lambda$7 (DrawerActivity.kt:248)
at com.owncloud.android.ui.activity.DrawerActivity.$r8$lambda$D_YMO0EvQvgnxMxwdaUwNHSdh-w
at com.owncloud.android.ui.activity.DrawerActivity$$ExternalSyntheticLambda5.onNavigationItemSelected
at com.google.android.material.navigation.NavigationBarView$1.onMenuItemSelected (NavigationBarView.java:291)
at androidx.appcompat.view.menu.MenuBuilder.dispatchMenuItemSelected (MenuBuilder.java:836)
at androidx.appcompat.view.menu.MenuItemImpl.invoke (MenuItemImpl.java:159)
at androidx.appcompat.view.menu.MenuBuilder.performItemAction (MenuBuilder.java:987)
at com.google.android.material.navigation.NavigationBarMenuView$1.onClick (NavigationBarMenuView.java:139)
at android.view.View.performClick (View.java:7892)
at android.view.View.performClickInternal (View.java:7869)
at android.view.View.-$$Nest$mperformClickInternal
at android.view.View$PerformClick.run (View.java:30891)
at android.os.Handler.handleCallback (Handler.java:942)
at android.os.Handler.dispatchMessage (Handler.java:99)
at android.os.Looper.loopOnce (Looper.java:226)
at android.os.Looper.loop (Looper.java:313)
at android.app.ActivityThread.main (ActivityThread.java:8762)
at java.lang.reflect.Method.invoke
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:604)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1067)
It was reported, sent a first solution in v4.2.1 but unfortunately, it didn't work and there are still appearances.
It might need another look