Okay have been checking a little bit more now, and it looks like my sites on Hostgator are okay. But the sites on my host in Norway get this error code.
So it might be a server related issue?
Getting the same error code on multiple sites, different hosting and themes.
Tried to connect to Twitter/Facebook, and got this error.
Started on April 29 when I saw one of my sites started to publicize the same posts multiple times on a Twitter account. So I had to disconnect from Jetpack publicize. When i tried to connect again to my Twitter account that’s when I first saw this error code.
Ah, ok I see!
Thanks for the quick reply guys ;.)
With the Simple Tags plugin acitvated, try to untick Active tags for page
See if that can help.