Hi @Gschupsde, Let me see if I can help you out here.
I would recommend you to try clearing data for the application called "download manager" and the application Play store.
You do this by following this guide: Go to settings > Apps & notifications > Choose "App info" > Tap the three vertical dots in the top right and choose "Show system" > Find the one called "Download manager" > Press "Storage" > Choose "Clear data". And also, do the same for the one called "Google play store".
Let me know how it went!
