photos 6.x-2.5-beta6 must use photos_access 6.x-1.0-beta5.
Small repair.
#316655: problem with not open here and collaboration users #316639: node with password redirect me to photos/privacy Password Authentication to improve the url. Please empty the cache.
Remove redundant code, delete the table "x_album_acuser" the PRIMARY KEY.
Look album photos.module