I tried to enable error commenting in the .htaccess file, following the instructions provided on this site. (I was getting an error while trying to access the appearance link at the top of the admin panel and was prompted on the error page to enable the commenting.) When I uncommented the necessary line, I went to my admin URL and tried to click on something and got the following: "No input file specified." I went back into the .htaccess file and recommented the error line, but that didn't fix the issue. Any thoughts on fixing this that doesn't involve deleting and reinstalling Omeka?