I can't authenticate against "my" server, too. The admins switched off SSLv3, so that might be the problem.

OTOH, starting the app from the terminal gives this output:

Login failed {"seq":0,"status":1,"content":{"error":"LOGIN_ERRO R"}} http status: 200

But I'm 100% sure that I'm using the correct credentials. I can authenticate with the "TT-RSS" app and the sailfish browser, too. So it must be something about this app.

Could anyone give me a hint how to debug this further?