An error occurred during the on-the-fly user creation
Error (ERROR_BAD_PARAMETER)

• in modules/core/classes/GalleryEmbed.class at line 350 (GalleryCoreApi::error)
• in /var/www/html/components/com_gallery2/classes/user.class at line 41 (GalleryEmbed::createUser)
• in /var/www/html/components/com_gallery2/classes/core.class at line 219 (user::newUser)
• in /var/www/html/components/com_gallery2/gallery2.php at line 25 (core::init)
• in /var/www/html/index.php at line 235