In your console, look 2 lines above the red line and you will find your problem.
Edit: Actually look at your whole console log.
It was clearly stated in the console that it’s missing a closing curly bracket, try to redo the config.lua.
Problem is around line 43, possibly more down there (code stops at first error encounter so it haven’t detect underlying error, yet), just make sure you check them all.
Have a nice day 
I would suggest using visual studio it’s a file editor that colors letters depending on what they are