have you really renamed the whole folder? because you mentioned “file” the whole folder needs to be renamed, so WordPress doesn’t load the plugin.
try this with each and every plugin you have installed. there are other plugins causing problems.
If this doesn’t help, try the forgot password function, if you still have access to the e-mail account.
there are also other ways to reset the password, which are explained here:
https://www.fixrunner.com/cannot-login-wordpress-admin-area/
—
Adrian Keller
kellerprojekte
zertifikat-loesung.de