Laravel Issues - Token missmatch

Question

I use Laravel 5.1 in my project.

When I open a url it sometimes works fine, but sometimes I get this screen:

I don't know why? What can be the problem? On every form I have {{ csrf_field() }}

Answer 1

Have you added exactly this in your forms?

<input type="hidden" name="_token" value="{{ csrf_field() }}">

Or have you just put {{ csrf_field() }} in your blade within your form? Because then you have to do:

{!! csrf_field() !!}