Cannot register on IdeaScale

I am running Firefox with JavaScript enabled, and running into issues with registration on the Cardano IdeaScale site. After submitting my email, I’m receiving “Unable to perform request (error)” on the top bar.

I have a feeling this is not strictly related to registration and may be a problem with browser settings. I’m also receiving this “Unable to perform request (error)” when I accept the cookie settings on the bottom bar.

My workaround was using a mobile browser. However it seems completely unusable on my desktop with Firefox.