"MetagGer Search" Client App, DOESN'T OPEN

Hello there! I’ve installed “MetaGer Search” client v4.2.2 (40202), f-droid version, But after tapping on the app, goes to background ! Tried all tricks, but NO SUCCESS. Then installed Directly from their SITE (which has an additional permission; “read … SD card” ), behaves just as f-droid version. 1st Wrote to “MetaGer” Support, but after 2 days, didn’t Answer. ★Device: Samsung Android 5

Appreciate your help! Regards: adhk

You might need to report here: https://gitlab.metager.de/open-source/app-en/-/issues

FYI, works fine for me on Android 11