500 Internal Server Error

[hieroo]

ERROR: Exception in ASGI application
Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/uvicorn/protocols/http/h11_impl.py", line 408, in run_asgi
result = await app( # type: ignore[func-returns-value]
File "/usr/local/lib/python3.9/dist-packages/uvicorn/middleware/proxy_headers.py", line 84, in call
return await self.app(scope, receive, send)
File "/usr/local/lib/python3.9/dist-packages/uvicorn/middleware/asgi2.py", line 16, in call
instance = self.app(scope)
TypeError: call() missing 1 required positional argument: 'start_response'
INFO: 192.168.181.1:54882 - "GET / HTTP/1.1" 500 Internal Server Error