@Mr.Xcoder Sorry for bothering you, but since I don't have access to your UA, I can't confirm that my workaround actually... works. Could you visit this link and that link, then tell me which one(s) give you a 404?
@Phoenix Some browsers encode the second # in https://tio.run/##<state> as %23, which I'm already accounting for in the frontend. However, it seems that there are browsers that encode both, which I tried to account for in Apache.
It's kind of messy. I compile the JAR for Neim, copy it into the NeimOnline JAR, which runs the webserver, which I then compile, upload to the server, go to Putty, and restart the process.
@Okx If you don't mind me asking, why aren't you interested in Neim on TIO? Is it simply because you'd rather run your own or is TIO lacking a feature?