In case config['default_cors_url'] is defined it will use it as CORS proxy.
In case PHP is not installed it falls back to the defined CORS proxy in config['default_cors_url'].
In case config['default_cors_url'] is not set, it will use cors-anywhere.herokuapp.com by default.
For normal use just remove the config['default_cors_url'] from your CONFIG.js and it should work.
A PHP based CORS proxy has been integrated.
In case config['default_cors_url'] is defined it will use it as CORS proxy. In case PHP is not installed it falls back to the defined CORS proxy in config['default_cors_url']. In case config['default_cors_url'] is not set, it will use cors-anywhere.herokuapp.com by default.
For normal use just remove the config['default_cors_url'] from your CONFIG.js and it should work.