I have followed this https://docs.prefect.io/tutorials/deployments/#configure-the-deployment with my own flow script.

I was able to run the flow via command line and it updated on the cloud ui. Once I started the prefect agent again, it threw some errors: FileNotFoundError: [Errno 2] No such file or directory: 'python'

I think i can redo the yaml and rename this to python3

I was able to command line queue the run after fixing the command line argument from python to python3. Although the Run option in deployments is still greyed out for me.