It has something to do with this web server. Everyday I'm on this forum, I occasionally receive 508 errors on page loads and sometimes the forum doesn't respond at all and I get a 404 error. Close all of your browsers, wait a minute, then try reloading it again. If it still doesn't work, wait 30-60 minutes and try again. Essentially, just keep trying, it will load eventually. I gather the web server is older technology.
Send me the content of your post in a personal conversation, I'll check it out. Sounds like an issue with some sort of word filters our hosting provider might have enabled during an update. We experienced a similar issue about a year ago. Some words such as viagra or casino were blocked for some reason. They're supposed to keep it disabled for us, but sometimes it's switched back on when they do maintenance once in a while.