can't login to „Thunder for Lemmy“ – IzzyOnDroid F-Droid Repository

Hi, i try to login to the Thunder app from IzzyOnDroid F-Droid (v0.8.2) with this account. After Entering the credentials (with TOTP) i only get a strang "error":"no_id_given" json-error.

i'm totally new to lemmy, sorry.

there is no similar error in the app repo https://github.com/thunder-app/thunder/issues?q=is%3Aissue+no_id_given