Has anyone encountered this error? I pulled the latest mailman suite (versions below), and facing this error in two places

• mass subscription add of users -> Click on mass-subscription for list, enter email

Django 2.2.11 django-allauth 0.41.0 django-appconf 1.0.3 django-ca 1.15.0 django-compressor 2.4 django-extensions 2.2.8 django-gravatar2 1.4.4 django-gunicorn 0.1.1 django-haystack 2.8.1 django-health-check 3.12.1 django-mailman3 1.3.2 django-object-actions 2.0.0 django-picklefield 2.1.1 django-prometheus 2.0.0 django-q 1.2.1 django-redis 4.11.0 django-redis-cache 2.1.0 django-rest-auth 0.9.5 django-saml2-auth 2.2.1 djangorestframework 3.11.0 djangorestframework-jwt 1.11.0

python3 -V Python 3.7.6

django-mailman3 1.3.2 HyperKitty 1.3.2 mailman 3.3.0 mailman-hyperkitty 1.1.0 mailmanclient 3.3.0 postorius 1.3.2

sADirectoryError: [Errno 21] Is a directory: '/usr/local/lib/python3.7/site-packages/mailman/templates'

[2020-03-17 03:56:54 +0000] [4220] [ERROR] Socket error processing request. Traceback (most recent call last): File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 134, in handle self.handle_request(listener, req, client, addr) File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 190, in andle_request util.reraise(*sys.exc_info()) File "/usr/local/lib/python3.7/site-packages/gunicorn/util.py", line 625, in reraise raise value File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/sync.py", line 175, in andle_request respiter = self.wsgi(environ, resp.start_response) File "/usr/local/lib/python3.7/site-packages/mailman/database/transaction.py", line 50, in wrapper rtn = function(*args, **kws) File "/usr/local/lib/python3.7/site-packages/mailman/rest/wsgiapp.py", line 193, in __call__ return super().__call__(environ, start_response) File "falcon/api.py", line 274, in falcon.api.API.__call__ File "falcon/api.py", line 269, in falcon.api.API.__call__ File "/usr/local/lib/python3.7/site-packages/mailman/rest/members.py", line 266, in on_post pre_approved=pre_approved) File "/usr/local/lib/python3.7/site-packages/mailman/app/subscriptions.py", line 523, in register list(workflow) File "/usr/local/lib/python3.7/site-packages/mailman/app/workflow.py", line 69, in __next__ return step()