An hour ago I changed the password of my Head Admin user. But after this I was not able to login anymore. So I have tried to reset the password in PHPmyadmin with the md5 encoding and even with this Wordpress hasher http://scriptserver.mainframe8.com/wordpress_password_hasher.php, but it does not work anymore.
I also tried other accounts, but they cannot login as well. The last thing I have tried is to use the new password function in the wordpress login screen, and also this does not work.
Does anyone have an idea what I need to do? Is the emergency reset script of Wordpress an option? https://codex.wordpress.org/Resetting_Your_Password