The discussion page never really worked well. I forgot to check it and so did the people posting there if I asked something. So now it’s gone. It’s instead been replaced by the “Help and Chat” page (name may change later) which lists a few places where VapourSynth users usually hang out.
I also started a discord server for VapourSynth since the other ones I was in died. Find the link in the “Help and Chat” page. That’s a bad name. I’ll change it later.