try to unblock the following youtube-nocookie.com - youtube nocookie for embeding with privacy(im not sure/ i guess this is optional)ytimg.com - this is for youtube imaging/ tumbnailsgooglevideo.com  -google search engine for videos mine worked with ...

im just using the categories , but whenever i tried to never block messenger.com the login form is not comming out

btw thanks, i already rescanned the domain in fortinet and requested them to rescan 

i already deleted my settings here in opendns but sometimes other devices still have that error , even i tried to delete their cookies and caches