Same here, was in half an hour ago, logged out to eat and now can't log back in and get the message about username/password being incorrect or inactive
The issues related to logging in to the megaservers have been resolved at this time. If you continue to experience difficulties at login, please restart your client. Thank you for your patience!
As there are multiple threads regarding the recent login issues we will be closing this one. Yesterday on 07/29/2020 there were login issues affecting all megaservers. These login issues should now be resolved.