[Fixed]-Django Allauth Custom Login Does Not Show Errors

Some errors are non field errors such as those errors which are raised for some custom validation and are not included in field.errors rather they are in form.non_field_errors:

So better use this snippet to show all errors which belongs to fields and to custom validation if you are rendering your form manually:

{% if form.errors %}
    {% for field in form %}
        {% for error in field.errors %}
            <div class="alert alert-error">
                <strong>{{ error|escape }}</strong>
            </div>
        {% endfor %}
    {% endfor %}
    {% for error in form.non_field_errors %}
        <div class="alert alert-error">
            <strong>{{ error|escape }}</strong>
        </div>
    {% endfor %}
{% endif %}