AttributeError: 'NoneType' object has no attribute 'dumps'

[zjm008]

Running fine in a docker, when i tried to run on my desktop error below came out.
Traceback (most recent call last): File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/uvicorn/protocols/http/httptools_impl.py", line 385, in run_asgi result = await app(self.scope, self.receive, self.send) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/uvicorn/middleware/proxy_headers.py", line 45, in __call__ return await self.app(scope, receive, send) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/applications.py", line 102, in __call__ await self.middleware_stack(scope, receive, send) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/middleware/errors.py", line 178, in __call__ raise exc from None File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/middleware/errors.py", line 156, in __call__ await self.app(scope, receive, _send) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/exceptions.py", line 82, in __call__ raise exc from None File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/exceptions.py", line 71, in __call__ await self.app(scope, receive, sender) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/routing.py", line 550, in __call__ await route.handle(scope, receive, send) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/routing.py", line 227, in handle await self.app(scope, receive, send) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/routing.py", line 41, in app response = await func(request) File "app.py", line 58, in homepage headers=response_header) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/responses.py", line 42, in __init__ self.body = self.render(content) File "/root/anaconda3/envs/py36/lib/python3.6/site-packages/starlette/responses.py", line 159, in render return ujson.dumps(content, ensure_ascii=False).encode("utf-8") AttributeError: 'NoneType' object has no attribute 'dumps'

[mzjuin]

After some searches. I found that request.json() is clashing with some other lib.
bug:
https://stackoverflow.com/questions/11369734/python-json-module-has-no-attribute-dumps

what I did to resolve this is I created another clean conda env for gpt-2-cloud-run to run, with only required packeges stated in the dockerfile. Now it can run on my local machine with gpu.