Not working with Laravel 5.5 & PHP 7.1 (fpm)

```
PHP execution trace follows...
#0 Illuminate\Routing\Router->prepareResponse() 
#1 Illuminate\Routing\Router->php-fpm: pool default (+0xe15b5)[0x7f9cd85e15b5]
PHP execution trace follows...
##2 0Illuminate\Routing\Pipeline ->Illuminate\Routing\RouterIlluminate\Routing\{closure}()->prepareResponse
```