I have a React frontend and a FastAPI backend. When I try to query the backend via the frontend, I get an error.

axios.post(myUrl, { key : "val" } );
>>>
Confirmation.js:227 
 POST <myUrl> 405 (Method Not Allowed)

Now the thing that’s really curious is that I can query from Python in a ipynb

r = requests.post(myUrl, json={key:"val"})
j = json.loads(r.text)
j['statusCode']
>>> 
200   

You might naturally wonder, what about CORS?
This is the CORS settings that I’ve defined via FastAPI

app.add_middleware(
    CORSMiddleware,
    allow_origins=['*'],
    allow_methods=['*'],
    allow_headers=['*']
)

Perhaps I’m missing something… Why might CORS settings 1/ have no effect on axios requests but 2/ work just fine from a Python notebook running on a different server?