01-07-2015, 04:29 AM
MCServer shouldn't be able to return a 400 code, it will generally return 500 codes. Probably there is some other server already running on the port. However there is the possibility that Chrome has broken something in the HTTP server, in which case we'd need the chrome version you're using and preferably the what the raw requests and responses are which you should be able to get through Chrome dev tools.