upgraded a site from 2.1.3 to 2.5.3 and once the upgrade successfully completed I tried to access the CP and get a blank page.
I checked .htaccess and found an old method for removing index.php
RewriteEngine on RewriteCond $1 !^(favicon\.ico|info\.php|index\.php|path\.php|php\.ini) [NC] # Exclude EE folders RewriteCond $1 !^(system|images|img|fr|themes|media)/ [NC] # Exclude 3rd party folders RewriteCond $1 !^(css|js|uploads|ca_en|ca_fr)/ [NC] # Remove index.php RewriteRule ^(.*)$ /index.php/$1 [L]
which I commented out and replaced with the official method - no change. The front end of the site loads fine, but I can't get into the backend. Any ideas?