Knowledge Base is here:
knowledge/ The link you posted is from the old version of the forum, which was swapped out like (no lie) 15 years ago.
Chat still works. Try using a regular computer and not a mobile browser:
http://cbe002.chat.mibbit.com/?server=irc.opera.com&channel=%23SSXNot sure why you'd want to use it though, the Discord is far better and actually manned. Fan Art Gallery likely will not be fixed as the software that it was hosted on has been discontinued.
Edit: it seems that my post is somehow above the pinned post. Did the pin feature break too?
What weird-ass browser are you using to look at the site? This is a desktop designed page, so it will look best on Firefox/Chrome for the Desktop. I installed a mobile theme some time ago, and after browsing on my android phone it works just fine in my samsung mobile, Firefox mobile and Chrome mobile. So I don't know what you're looking at the site with, but change it.