There is a UI bug where if you put in the wrong password it just spins forever (no error returned to the user)..
Please try to reset your password. That solves login issues for me most of the time.
Steps to do that:
- Put the email address you signed up with into the login field and click Forgot Password.
- check your email
- click the reset password link
- set your new password back to what it was supposed to be
- try to log in
If all that fails, try again in a different browser.
Again, there are issues on the lemmy-ui GitHub page for password and wonky login behavior.