PHP Catchable fatal error:  Argument 2 passed to
Illuminate\Routing\UrlGenerator::__construct()
must be an instance of Illuminate\Http\Request,null given,called in
/www/laravel5/vendor/laravel/framework/src/Illuminate/Routing/RoutingServiceProvider.PHP
on line 56 and defined in
/www/laravel5/vendor/laravel/framework/src/Illuminate/Routing/UrlGenerator.PHP
on line 81

Catchable fatal error: Argument 2 passed to
Illuminate\Routing\UrlGenerator::__construct()
must be an instance of Illuminate\Http\Request,called in
/www/laravel5/vendor/laravel/framework/src/Illuminate/Routing/RoutingServiceProvider.PHP
on line 56 and defined in
/www/laravel5/vendor/laravel/framework/src/Illuminate/Routing/UrlGenerator.PHP
on line 81

我绝对不知道是什么导致它,需要帮助.

提前致谢