Error Label 'http' already defined Laravel

I don't know how can i get this error. is says :

FatalErrorException in web.php line 21
Label 'http' already defined

there is no error before. I get this error after my PC hard boot because electrical issue.

Anyone knows how to fix this ?

UPDATE

This is line 21 of web.php

This is the route page of Laravel 5.3.28

via Chebli Mohamed