The version of python-django-filter in EPEL-7 is incompatible with the rest of the EPEL-7 Django stuff, so it needs to updated to at least version 1.0.2.
python-django-filter-1.0.2-1.el7 has been submitted as an update to Fedora EPEL 7. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-cba2a93d68
python-django-filter-1.0.2-1.el7 has been pushed to the Fedora EPEL 7 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-cba2a93d68
python-django-filter-1.0.2-1.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.