What Does this mean "Assets/Editor/Master Server.js(2,1): BCE0044: expecting :, found 'include'" And in the script this is the line that needs to be fixed : "#include "BitStream.h"

It means you have a script called Master Server.js in your Assets/Editor folder, and it is trying to use C/C++ terminology. Remove that line, but really, what's the rest of it look like? It could be someone renamed a C++ file to .js and tried to use it as such. Which won't work.