HELP ASAP!! Cpanel login stuck in redirect loop

I need help!!! I used Updater to update Expression Engine. I was updating from version 2.5.5. I believe updater loads in version order. It updated to 2.6 then threw an error. Now when I log in, it does not throw and error that I entered the wrong username or password, but redirects to the login page again.

Any help as soon as possible would be great!!!!

thanks,

Shannon