"incompatible airsonic rest protocol version. Server must upgrade".

[etyrnal]

Every other subsonic client i use (several) connects to my airsonic server without complaint. ONLY Castafiore complains. My airsonic instalations (2) are both quite recent. How do i make Castafiore connect? I am using Castafiore on an android watch and chose it because the navigation is decent for how i use my airsonic server. I create a special users just for the watch, and have a giant playlist with all my favorite music shuffled in it. Nice and easy. But Castafiore refuses to connect because "incompatible airsonic REST protocol version. Server must upgrade".

Server must upgrade? Yet, at the same time, has a setting to allow 'legacy'?? Makes no sense.

Can i just make some new credentials of the proper kind? Why can't Castafiore connect ?