This happens because forms by default contain CSRF protection, which is not necessary in some cases.
You can disable this CSRF protection in your form class in getDefaultOptions
method like this:
// Other methods omitted
public function getDefaultOptions(array $options)
{
return array(
'csrf_protection' => false,
// Rest of options omitted
);
}
If you don't want to disable CSRF protection, then you need to render the CSRF protecion field in your form. It can be done by using {{ form_rest(form) }}
in your view file, like this:
<form novalidate action="{{path('signup_index')}}" method="post" {{form_enctype(form)}} role="form" class="form-horizontal">
<!-- Code omitted -->
<div class="form-group">
<div class="col-md-1 control-label">
<input type="submit" value="submit">
</div>
</div>
{{ form_rest(form) }}
</form>
{{ form_rest(form) }}
renders all fields which you haven't entered manually.