netbox/netbox/templates/exceptions/import_error.html

{% extends '500.html' %}
{% load i18n %}

{% block message %}
  <p>
    {% trans "A module import error occurred during this request. Common causes include the following:" %}
  </p>
  <p>
    <i class="mdi mdi-alert"></i>
    <strong>{% trans "Missing required packages" %}.</strong>
    {% blocktrans trimmed %}
      This installation of NetBox might be missing one or more required Python packages. These packages are listed in
      <code>requirements.txt</code> and <code>local_requirements.txt</code>, and are normally installed as part of the
      installation or upgrade process. To verify installed packages, run <code>pip freeze</code> from the console and
      compare the output to the list of required packages.
    {% endblocktrans %}
  </p>
  <p>
    <i class="mdi mdi-alert"></i>
    <strong>{% trans "WSGI service not restarted after upgrade" %}.</strong>
    {% blocktrans trimmed %}
      If this installation has recently been upgraded, check that the WSGI service (e.g. gunicorn or uWSGI) has been
      restarted. This ensures that the new code is running.
    {% endblocktrans %}
  </p>
{% endblock message %}