network_inventory/src/core/templates/core/partials/modal.html

{% load crispy_forms_tags %}

<div id="modal-backdrop" class="modal-backdrop fade show" style="display:block;"></div>
<div id="modal" class="modal fade show" tabindex="-1" style="display:block;">
    <div class="modal-dialog modal-dialog-centered">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">{{ modal_title }}</h5>
            </div>
            <div class="modal-body">
                {% crispy form %}
            </div>
        </div>
    </div>
</div>