I recently moved a site to a new server and everything went very well. There is one page that requires http authentication to access it. One member group was not able to log in, so I reset the password for that member, but they are not still not able to log into the page and I am not able to log in as Super Admin either. If I remove the access restrictions I can access the page without issue.
Running EE 2.7.2 and yes there is an .htaccess file.