XWiki - users suddenly cannot log in, invalid password message even though password is correct

Question

For unknown reason, some of my XWiki users cannot log in. Their accounts are enabled and they are providing correct username/password, yet they receive Error: Invalid credentials.

We tried multiple accounts, and we are providing correct credentials.

Answer 1

Essentially the issue was that we moved some users profile pages under different parent in the page tree.

After moving their profile pages back under XWiki page (where they are created by default), they are able to log in again.