Spotify on samsung gear fit 2

[7Schwaene]

I cannot log on. The login always fails. I tried disconnecting all devices I tried every combination of bluetooth and wlan. Nothing works and I'm frustrated beyond belief. In Germany you cannot set device passwords so that's out of question too. Can somebody help me? The spotify offline thing was the reason to get this gear. The remote works but I wanna use my premium account and just the watch for running