I was adding some php file uploader to my Microsoft server 2016. I had the software company dial into the server to help look at config and now all my sites are down and it only shows a http 500 error? And no matter what I change around I can't get the sites to give me any error messages or anything. I am unable to reach the software support people today for some reason and need to get the sites back up. Any clue on a way to troubleshoot this?
Main site is using .asp, and I added php which seemed to be working also. I just don't know if somehow the rights got changed? even the files with .html won't work either?