First off, the site is a cloned site. I can login to the source site no problem, with 2 different accounts. But on the cloned site, neither login works.
I tried resetting the password, and the process seems to work - but the new password is not accepted either. I tried
wp_set_password( 'password', 1 ); in functions.php as well and that did not work either.
Is this a plugin conflict of some kind?