"Network Protocol Error

An error occurred during a connection to subeta.net.

The page you are trying to view cannot be shown because an error in the network protocol was detected.

Please contact the website owners to inform them of this problem."

Uhm...say what?!

I was trying to feed my pet, Shusei, from my inventory. Something strawberry, but not sure. It happened twice, about an hour apart. I'm on firefox, windows, desk PC, latest all.