MLMYM (old.lemmy.sdf.org) not allowing posting, commenting, or any interaction - eviltoast

Not sure when exactly it started, but the MLMYM instance here seems to be “read only”, for lack of a better term. Attempts to comment, post, or even vote on content do not work. I can still log in and out normally, still view subscribed content, but nothing else works. Not sure what’s going on.