Internal Server Error

```
Traceback (most recent call last):
File "/home/specter/.env/lib/python3.7/site-packages/flask/app.py", liine 2447, in wsgi_app response = self.full_dispatch_request()
File = "/home/specter/.env/lib/python3.7/site-packages/flash/app.py", line 1953, in full full_dispatch_requestreturn self.finalize_request(rv)
File "/home/specter/.env/libpython3.7/size-packages/flash/app.py", line 1968, in finalize_request
response = self.make_response(rv)
File "/home/specter/.env/lib/python3.7/site-packages/flask/app.py", line 2131, in make_response
" {rv.class.__name}."format(rv=rv_
TypeError: The view function did not return a valid response. The return type must be a string, dict, tup
```