500 error when loading /studio/list/27044057

[jsarchibald]

Replicate here

When accessing /studio/list/27044057, there's a 500 error. The traceback says:

Traceback (most recent call last):
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/webadmin/getting-unstuck-web/app.py", line 328, in studio_list
    studio = scrape.Studio.objects(studio_id = sid).first()
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/mongoengine/queryset/base.py", line 287, in first
    result = queryset[0]
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/mongoengine/queryset/base.py", line 191, in __getitem__
    queryset._cursor[key],
  File "/home/webadmin/getting-unstuck-web/env/lib/python3.8/site-packages/mongoengine/queryset/base.py", line 1666, in _cursor
    self._cursor_obj = self._collection.find(self._query, **self._cursor_args)
AttributeError: 'NoneType' object has no attribute 'find'