I was trying to answer this question. I tried multiple times to submit an answer (which eventually turned into a comment). The site informs me that "An error occurred submitting the answer.", so I try refreshing the page. I then try discarding the draft, at which point the site takes me to a page, which says:
Sorry, your request could not be completed because it looked suspicious. If you meant to perform an action on Mathematics Stack Exchange, please return to the previous page and try again.
which I did, only to find the same problems. What's going on here?