I upgraded from 5.5 to 5.7, and now, Brilliant Gallery simply will not work. You go to the specified path such as "gallery" set in Brilliant Gallery settings, and it says "page not found", you check settings everything seems fine, you check access controls but everyone can access Brilliant Gallery so that's not the problem either. File System is public and the files folder is there. It was working fine in 5.5, but after the upgrade, I cannot get it to work anymore, the menu-item link has disappeared.