So when I try to use the console I get this "DevTools failed to load SourceMap: Could not load content for file:///D:/Games/Casting%20Director%20[v0.024%20Alpha]/es6-shim.map: System error: net::ERR_FILE_NOT_FOUND"
Anyone know how to fix this ?
Ignore it. You'll see that on most, if not all HTML games, but it has no impact on the games themselves.
My best guess would be that it is some sort of developer tool used when creating the game.
Generally, if the error code is yellow, it is not important.
Red is more serious and it mostly points out missing files or files with wrong name, ignore the 'ModLoader.js not found' if you play an online version, as it is the tool used to load mods into the game.