Azura's star was lagging bad for me. I restarted the game to see if it would fix the issue but after signing in I now hit a never ending loading screen into cyrodil.
If you exit the game without waiting using the quit now feature I notice lately the ESO64 process can be still running in the task manager processes. Be sure to manually end the process before restarting the game. When logging off using the ESC > log off > waiting the 10 seconds > back > quit sequence it seems to prevent issues of endless load screen if you are attempting to log back in immediately.
Try logging in with a different character then log out waiting for the timer to count down then log in on the one that's stuck. It's worked for me before.