Traceback (most recent call last):
File "/home/ubuntu/kwikee/projects/venv/lib/python3.6/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/home/ubuntu/kwikee/projects/venv/lib/python3.6/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/ubuntu/kwikee/projects/venv/lib/python3.6/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/ubuntu/kwikee/projects/venv/lib/python3.6/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/home/ubuntu/kwikee/projects/venv/lib/python3.6/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/home/ubuntu/kwikee/projects/venv/lib/python3.6/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "app.py", line 77, in result
category = category.lower()
AttributeError: 'NoneType' object has no attribute 'lower'
2019-08-19 16:29:57 _internal _log INFO 127.0.0.1 - - [19/Aug/2019 16:29:57] "GET / HTTP/1.0" 500 -