If your login page is cached by any page cache in your WordPress install, or cacheing on your hosting company or cloud proxy (e.g. Cloudflare), empty (flush) these caches. If the problem persists, then the page is likely cached by the user’s web browser; encourage them to empty their web browser, and to press the “reload” button in their web browser whilst holding the “shift” key on their keyboard (which will tell their web browser to bypass its cacheing). Or you can temporarily ask them to try in a different web browser or “incognito / private” window until the problem passes when the cache expires.
Alternatively, until the problem clears, tell them to add their TFA code on the end of their password. i.e. If their password is some7$thing (please don’t use that as a password!), and the TFA code is 123456, then they should enter the password as some7$thing123456.
Posted in: Two Factor Authentication