I'm running TC2.91 on Android 10 (Pixel 3a). Before the update to Android 10 I could install APKs from network shares or local SD. To do so obviously I had to allow unknown sources in the settings.
Now TC throws an error "couldn't open file" when I try to install an APK from SD. System | App/Notification | Extended | Special App-Access | Install unknown Apps lists TC as allowed, though.
Any idea what's wrong here, what can I do?

Best regards
Mark.