It seems the provider does not work, when 2FA is enabled (which seems reasonable at first). The API should support API-Tokens instead.
│ Error: Could not get domain info
│
│ API response not status code 1000. Got response: {"code":2200,"details":[{"code":"ACCOUNT_LOCKED","msg":"You need to unlock your account with your mobile
│ TAN"}],"msg":"Authentication error","reason":"You need to unlock your account with your mobile TAN.","reasonCode":"Error_AccountUnlockRequired"}
It seems the provider does not work, when 2FA is enabled (which seems reasonable at first). The API should support API-Tokens instead.