Sims4Studios.com has an A-records problem with their cloudflare subhost. I imagine that it won't take all that long for them to fix it, but you might find some people from over there posting their content over here.
I have 81 submissions over there. I now have 2 uploads pending over here, my max.

Hopefully S4S will get straightened out soon.

They're aware of the problem but no ETA for a fix. https://www.facebook.com/sims4studio