We have received your bugreport. It looks like the application is broken - it tries to access a non-existing package. I'd suggest you contact the application developers and provide them this information:
I GrantPermissionsActivity: No package: null
I GrantPermissionsActivity: android.content.pm.PackageManager$NameNotFoundException
I GrantPermissionsActivity: at android.app.ApplicationPackageManager.getPackageInfoAsUser(ApplicationPackageManager.java:147)
I GrantPermissionsActivity: at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:132)
I GrantPermissionsActivity: at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.getCallingPackageInfo(GrantPermissionsActivity.java:354)
I GrantPermissionsActivity: at com.android.packageinstaller.permission.ui.GrantPermissionsActivity.onCreate(GrantPermissionsActivity.java:103)
I GrantPermissionsActivity: at android.app.Activity.performCreate(Activity.java:6682)