There was an issue when Moodle required a "login token" and many themes didn't have it implemented and many sites lost the ability to login. It is possible that you had an outdated version of Moove and it didn't have the login token code present in the theme. Deleting the Moove theme from your server and then deleting the Cache folder in moodledata should cause Moodle to revert back to default Boost. This will have the proper login token and work for logins.
There was also a Config.php hack you could use to bypass the login token but I cannot remember what is was.
A search in the theme forum for "login token" might benefit you.
There was also a Config.php hack you could use to bypass the login token but I cannot remember what is was.
A search in the theme forum for "login token" might benefit you.