User blog comment:Allam948736/Why can't I comment anymore?/@comment-37212455-20191221021825

I know exactly what you're talking about! It could've been that you either haven't refreshed your cache (in which case you should append "?action=purge" at the end of a URL and load the page again), or perhaps you spent so much time writing a comment that the 'cookie' for your comment expired. Do not take me for an expert on this sort of thing, but refreshing the page/trying again/clearing your internet cookies may help. Also have a doc open where you work on long comments just in case, because it is frustrating to type something out and have it be rejected.