Thread:Project:Support desk/No input file specified?

I had got some help on making the short URL's work and it's been working for weeks now.

Today when I went on the wiki, I get a blank white page that says "No input file specified."

Any ideas why this is happening now? I still can get to the wiki by using the long URL's...so it seems something has changed maybe with the host or somewhere I don't know, but thought I'd ask here first.