Does anyone else use the android app Connect for Lemmy? It reminds me of Infinity for Reddit. If you use it, do you like it better than Jerboa? I also found another new Lemmy app called Liftoff.
Connect for Lemmy: https://play.google.com/store/apps/details?id=com.kuroneko.lemmy_connect
There were big api change with lemmy 0.18 which the updated jerboa is compatible with. The instance you were trying to log into is outdated.