There is a bug I encountered with the Ritual mission. When you have to go through those portals to defeat the wizards in order to show Savathun that worm memory, one of the portals will not work. I walk, run, and jump into it but nothing. I tried leaving and restarting from where I left off but it still doesn't work. Also I am unable to provide a video due to Vimeo and video compression sites not working.