I've uploaded GIFs to the art portal before, so when I tried to upload this and got an error message, I was super confused.

Is there a size limit now of some sorts in the art portal? Are certain things not allowed? Did the servers break because of my super awesome hentai skills?
I'd PM Tom about it, but I don't think he moderates the art portal. Anyone know who I could contact about this?

It just gives me a really bland "ERROR — Sorry, there was a problem with your request. Please try again later." -message, so I don't know what's going on.
I tried uploading something different to see if I was banned or something, but jpgs and stuff work.
Then I tried uploading this cute cat gif and it gave me the same message!

What happened to the art portal? Did they change stuff around?