Don't open the materials file with the Wordpad. At least use Notepad++ for it. Also, for the materials to work, the materials file needs to be a .json file instead of .cs; but simply changing the file extension won't make it work
Dude this is a content creation category so it's probably his own mod. I have no idea what is wrong here, but I agree that redoing the materials file from scratch in json format may help, it's easier to read the file in that format so easier to spot what is wrong in it.
