Cannot play rust,interesting image pops up

I was able to play on experimental for about an hou however, I have just started receiving these images when I try to log then it drops me to desktop. I have never seen this before

That’s an EAC error. Verify the game integrity in Steam.

EAC error? Odd…have had really no issues at all. BUT! Ok…was able to get back onto Rust after I did a reboot. However, now…when I went back to building, I can’t place a wall without dropping my connection. This has been a weird night