No white space that I can see. Error exists on creating the list and also clicking on it.
Django Version: 1.11.14 Exception Type: KeyError Exception Value: 'file' Exception Location: /opt/rh/rh-python35/root/usr/lib64/python3.5/tempfile.py in __getattr__, line 477 Python Executable: Python Version: 3.5.1 Python Path: ['/atldata/mailman-suite/mailman-suite_project', '/atldata/venv-3.5/lib/python3.5/site-packages/django_q-0.9.4-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/lockfile-0.12.2-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_extensions-2.0.7-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_haystack-2.8.1-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/networkx-2.1-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_compressor-2.2-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_paintstore-0.2-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/robot_detection-0.4-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/djangorestframework-3.8.2-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_mailman3-1.2.0a2-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/arrow-0.12.1-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/blessed-1.15.0-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_picklefield-1.0.0-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/decorator-4.3.0-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/rjsmin-1.0.12-py3.5-linux-x86_64.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/rcssmin-1.0.6-py3.5-linux-x86_64.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/django_appconf-1.0.2-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/wcwidth-0.1.7-py3.5.egg', '/atldata/venv-3.5/lib/python3.5/site-packages/mailman_hyperkitty-1.1.1-py3.5.egg', '/atldata/mailman-suite/mailman-suite_project', '/atldata/venv-3.5/lib/python3.5/site-packages', '/opt/rh/rh-python35/root/usr/lib64/python35.zip', '/opt/rh/rh-python35/root/usr/lib64/python3.5', '/opt/rh/rh-python35/root/usr/lib64/python3.5/plat-linux', '/opt/rh/rh-python35/root/usr/lib64/python3.5/lib-dynload', '/opt/rh/rh-python35/root/usr/lib64/python3.5/site-packages', '/opt/rh/rh-python35/root/usr/lib/python3.5/site-packages'] Server time: Thu, 12 Jul 2018 20:59:59 +0000