Try this solution from user on discord:
Olloch - Today at 7:52 PM
ALRIGHT SO: The issue was: The gods dont want you to cross please relaunch your client:
The fix was: turn and head back into your server around 100 tiles before relogging. It looks like relogging near the server border or the "buffer zone" if thats a thing actually causes you to become bugged out again. I tested this by logging out near the border and attempted to cross, it did not work. After running back 100 tiles before relogging i was able to cross successfully upon relog. I tested this three times to be sure.
TLDR: Relog away from server borders 100+ tiles if you get stuck, be sure to close the launcher.