At every mod (Including mine) i get this nice message: Sorry! An error was encountered while processing your request: That item does not exist. It may have been removed by the author. Help me before I go mad, I want to see a comment someone made. =|
Could be Steam just having a temporary problem, it happens pretty often. If it's still going on in a couple hours then well... I'm not sure.
It claims every mod on there has been removed by the author. Including my own which I certainly have not removed. (I'm accessing through the website).