startup-command is not a valid input for Windows web app or with publish-profile auth scheme

Question

I have a python app (streamlit app) deployed on App Service using GitHub Actions.

• when I set the startup-command from the azure web app. -> it works
• when I set it in the yaml file, I get the error below and the deployment fails

I understand I cannot set startup-command when I have "publish-profile auth scheme". But why I can do it on the azure web app ? and how I can app service know how to start the app ?

The error :

##[debug]Result: '***'
##[debug]Loading env
Run azure/webapps-deploy@v2
::add-mask::***
::add-mask::***
Error: Deployment Failed, Error: startup-command is not a valid input for Windows web app or with publish-profile auth scheme.
##[debug]Deployment failed
##[debug]Node Action run completed with exit code 1
##

Yaml extract :

Answer 1

@Farès Thanks for reaching here! Could you confirm if the azure web app is on linux?

For windows azure python web app deployment see- Quickstart: Deploy a Python (Django or Flask) web app to Azure App Service