My wp-admin stops working suddenly

wp-admin stopped working suddenly.

I have checked the .htaccess file as well as wp config. However still it’s not working.

Site is working correctly but wp-admin page re-directs to to auth=1. Don’t know what happened. I tried to backup the .htaccess file but still don’t works.

Please guide.

Are you able to see the login screen? When exactly do you get redirected?

Try to go to http://yoursite.com/wp-login.php enter your user and password, and see if it works. If it works, the issue could be related to a plug-in.