I have now upgraded the Divisions by zero to Lemmy 0.19.0. I haven't seen any issues, but of course you will have to re-login.
Please check the new features here
I have also updated Pythörhead to be able to handle the new authentication (as well as the old), so if you're running a bot, make sure to update your Pythörhead dependencies.
Now is also a good time that you can support the running of this server. If you just want to support this instance, please use Ko-fi and you can get a custom emoji here. If you want to support my general development efforts as well (Lemmy, Pythorhead, Fediseer, Tagginator etc) feel free to use my liberapay
I'm having the same problem. I cleared my cache and tried signing out and signing in again, but it's giving me that same exact message. Hopefully it will work again soon.
I don't think it's the client because lemmy.one also upgraded to 0.19.0 recently, and I didn't have a problem there. I think there are just some bugs with 0.19.0 that need to be worked out in general, because I'm occasionally having some odd behavior, even on Windows and Linux using Firefox.