"Permission Denied" when trying to deploy FastAPI app using Uvicorn

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Hello, I have been trying to deploy a FastAPI app to Render using uvicorn but I’m constantly running into errors.

When I first built my app using pip install -r requirements.txt and started it using Gunicorn:
cd app && gunicorn -w 4 -k uvicorn.workers.UvicornWorker main:app,
the app never showed any errors but did not load after going to the site.

I then came across the thread about deploying with uvicorn and realising it was not on the same port, I used the same command but to no avail. It shows me these errors in the logs now:

Nov 23 12:11:39 PM  ==> Starting service with 'cd app && uvicorn main:app --host 0.0.0.0 --port 80'
Nov 23 12:11:42 PM  INFO:     Started server process [48]
Nov 23 12:11:42 PM  INFO:     Waiting for application startup.
Nov 23 12:11:42 PM  INFO:     Application startup complete.
Nov 23 12:11:42 PM  ERROR:    [Errno 13] error while attempting to bind on address ('0.0.0.0', 80): permission denied
Nov 23 12:11:42 PM  INFO:     Waiting for application shutdown.
Nov 23 12:11:42 PM  INFO:     Application shutdown complete.

Can someone please help me out?

Thanks in advance!

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