The "Tag this video" button has not been functioning for about a week now.
An example of video I am trying to tag, would be the Guardian Heroes Quick Look: https://www.giantbomb.com/shows/quick-look-guardian-heroes/2970-14626/free-video
The prompt to add tags shows up fine, but when you select "Add tags" button it reloads the page appending the tags you selected to the URL of the video.
So for example if I try to add Jeff and Vinny as hosts of the Guardian Heroes Quick Look the URL becomes: https://www.giantbomb.com/shows/quick-look-guardian-heroes/2970-14626/free-video?entity=2300-5076&hosts%5B0%5D=2100-26&hosts%5B1%5D=2100-31
I have tried tagging other videos but they all exhibit this behavior. I have also tried multiple browsers, with & without extensions, and private browsing modes. They all do the same thing when trying to tag a video.