[Django]-Django attribute error: 'module' object has no attribute 'is_usable'

It looks like Django is looking for a usable template loader, but is finding something in settings.TEMPLATE_LOADERS that isn’t honoring the template loader function protocol (described briefly here.)

Is it possible that one of your recent changes was to either settings.TEMPLATE_LOADERS or to a custom template loader? If the latter, your template function needs an is_usable attribute, presumably set to True.