I am running GrapheneOS Android 13 on a Pixel 4 XL. At some point the banking app for authentification, the "Deutsche Bank photoTAN" app, worked. Now, when I press the button to open the app, I only get to see a white screen with the logo of the app on top, but then nothing else happens. The bank just tells me to reinstall, but that did not help. The banking app "Deutsche Bank Mobile" app does work, but it is not for authentification. In GrapheneOS, under the app "Apps", I already have "Google Play services" installed.
What can I do to get the "Deutsche Bank photoTAN" app to start?
Links to the mentioned apps:
https://play.google.com/store/apps/details?id=com.db.pbc.phototan.db
https://play.google.com/store/apps/details?id=com.db.pwcc.dbmobile
Please let me know if you need more information and how I can get this information.