Argument 2 passed to Illuminate\Routing\UrlGenerator::__construct() must be an instance of Illu minate\Http\Request, null given, code example

Example: Argument 2 passed to Illuminate\Routing\UrlGenerator::__construct() must be an instance of Illuminat e\Http\Request

Please make sure that you are not using any url() or asset() or other helpers 
functions inside your configuration files