TokenMismatchException after Form submit

Hey guys,

I have a login-form and when I hit the submit button I get this error:

TokenMismatchException in VerifyCsrfToken.php line 67:

I wonder why I get this error, because I have run the make:auth command and just changed some styling of the form. As you can see in my form below, I have already implemented the {!! csrf_field() !!}

Do you have any idea what I may have forgotten to look at?

 <form role="form" method="POST" action="{{ url('/login') }}">
                {!! csrf_field() !!}

                <div class="row">

                    <div class="medium-2 columns"></div>
                    <div class="medium-8 columns">
                        <label>E-Mail</label>
                        <input type="email" name="email" value="{{ old('email') }}" />

                        @if ($errors->has('email'))
                            <span>
                                <strong>{{ $errors->first('email') }}</strong>
                            </span>
                        @endif
                    </div>
                    <div class="medium-2 columns"></div>

                    <div class="medium-2 columns"></div>
                    <div class="medium-8 columns">
                        <label class="medium-4 columns">Passwort</label>
                        <input type="password" name="password" />

                        @if ($errors->has('password'))
                            <span>
                                <strong>{{ $errors->first('password') }}</strong>
                            </span>
                        @endif
                    </div>
                    <div class="medium-2 columns"></div>

                    <div class="medium-2 columns"></div>
                    <div class="medium-8 medium-centered columns">
                        <button type="submit" class="button expand">Log In </button>
                    </div>
                    <div class="medium-2 columns"></div>
                </div>
            </form>