TemplateSyntaxError and NoReverseMatch error

class Step(models.Model):
    title = models.CharField(max_length=255)
    description = models.TextField() 
    order = models.IntegerField(default=0)
    course = models.ForeignKey(Course)

    class Meta:
        abstract = True
        ordering = ['order',]

    def __str__(self):
        return self.title

class Text(Step):
    content = models.TextField(blank=True, default='')

    def get_absolute_url(self):
        return reverse('courses:text', kwargs= {
            'course_pk': self.course_id,
            'step_pk':self.id
        })

class Quiz(Step):
    total_questions = models.IntegerField(default=4)

    class Meta:
        verbose_name_plural = "Quizzes"

    def get_absolute_url(self):
        return reverse('courses:quiz', kwargs= {
            'course_pk': self.course_id,
            'step_pk':self.id
        })

class Question(models.Model):
    quiz = models.ForeignKey(Quiz)
    order = models.IntegerField(default=0)
    prompt=models.TextField()

    class Meta:
        ordering = ['order',]

    def get_absolute_url(self):
        return self.quiz.get_absolute_url()

    def __str__(self):
        return self.prompt

def course_list(request):
    courses = models.Course.objects.all()
    return render(request, 'courses/course_list.html', {'courses': courses})


def course_detail(request, pk):
    course = get_object_or_404(models.Course, pk=pk)
    # chain() takes all the arguments and sorts it based on the key
    steps = sorted(chain(course.text_set.all(), course.quiz_set.all()),
            key=lambda step:step.order) #lambda is an unnamed function

    context = {
        'course':course,
        'steps': steps
    }
    return render(request, 'courses/course_detail.html', context)


def text_detail(request, course_pk, step_pk):
    step = get_object_or_404(models.Text, course_id=course_pk, pk=step_pk)
    return render(request, 'courses/text_detail.html', {'step': step})


def quiz_detail(request, course_pk, step_pk):
    step = get_object_or_404(models.Quiz, course_id=course_pk, pk=step_pk)
    return render(request, 'courses/quiz_detail.html', {'step': step})

@login_required
def quiz_create(request, course_pk):
    course = get_object_or_404(models.Course, pk=course_pk)
    form = forms.QuizForm()

    if request.method == 'POST':
        form = forms.QuizForm(request.POST)
        if form.is_valid():
            quiz = form.save(commit=False) # don't put in the database, just make the model instance
            # modify some stuff first
            quiz.course = course
            quiz.save()
            messages.add_message(request, messages.SUCCESS,
            "Quiz_added")
            return HttpResponseRedirect(quiz.get_absolute_url())

    context = {
        'form': form,
        'course':course
    }
    return render(request, 'courses/quiz_form.html', context)

@login_required
def quiz_edit(request, course_pk, quiz_pk = None):
    previously_created_quiz = get_object_or_404(models.Quiz, pk=quiz_pk,course_id=course_pk)
    form = forms.QuizForm(instance=previously_created_quiz) #tell django to start from previous quiz

    if request.method == 'POST':
        form = forms.QuizForm(instance=quiz, data=request.POST)
        if form.is_valid():
            form.save()
            messages.success(request, "Updated {}".format(form.cleaned_data['title']))
            return HttpResponseRedirect(quiz.get_absolute_url())


    context = {
        'form': form,
        'course': previously_created_quiz.course
    }
    return render(request, 'courses/quiz_form.html', context)

{% extends "courses/layout.html" %}


{% block title %}{{ form.instance.title|default: "New Quiz" }} | {{ course.title }} {{ block.super }}{% endblock %}


{% block breadcrumbs %}
    <li><a href="{% url 'courses:detail' pk=course.pk %}">{{ course.title }}</a></li>
{% endblock %}


{% block content %}
    <div class="row columns">
        {{ block.super }}
        <h1>{{ form.instance.title|default: "Make a New Quiz" }}Make a new quiz</h1>
        <form method="POST" action="">
            {% csrf_token %}
            {{ form.as_p }}
            <input type="submit" class="button" value="Save">
        </form>

    </div>
    {% endblock %}

{% block content %}
    <div class="row columns">

        <article>
            {{ block.super }} -->
            <h1>{{ step.title }}</h1>
            <p>Quiz questions here</p>
        </article>
        {% if user.is_authenticated %}
        <hr>
        <a href="{% url 'courses:edit_quiz' course_pk=step.course.pk quiz_pk=step.pk %}" class="button">
            Edit</a> 
            {% endif %}
    </div>
{% endblock %}