CSRF令牌无效.请尝试重新提交表单

我每次尝试提交表单时都收到此错误消息:

CSRF令牌无效.请尝试重新提交表单

我的表单代码是这样的:

    

        {{ form_label(form.email, 'Email', {'label_attr': {'class': 'col-md-1 control-label'}}) }}
        {{ form_widget(form.email, {'attr': {'class': 'col-md-2'}}) }}
        {{ form_errors(form.email) }}
    

    

        {{ form_label(form.nickname, 'Nickname', {'label_attr': {'class': 'col-md-1 control-label'}}) }}
        {{ form_widget(form.nickname, {'attr':{'class': 'col-md-2'}}) }}
        {{ form_errors(form.nickname, {'attr': {'class': 'col-md-3'}}) }}
    
    

        {{ form_label(form.password, 'password', {'label_attr': {'class': 'col-md-1 control-label'}}) }}
        {{ form_widget(form.password, {'attr': {'class': 'col-md-2'}}) }}
        {{ form_errors(form.password, {'attr': {'class': 'col-md-3'}}) }}
    

    

        {{ form_label(form.password_repeat, 'Repeat password', {'label_attr': {'class': 'col-md-1 control-label'}}) }}
        {{ form_widget(form.password_repeat, {'attr':{'class': 'col-md-2'}}) }}
        {{ form_errors(form.password_repeat, {'attr': {'class': 'col-md-3'}}) }}
    
    

        

        
    

    

有任何想法吗？