How do I delete this Azure Function/App Service

Question

Hi

I have tried everything to delete two Azure Functions but nothing works. In the Azure CLI I ran this command :

az webapp delete --name ProcessNotification --resource-group rgPaymentsDemo

And then I get the following error message:

Operation returned an invalid status 'Internal Server Error'

In the Azure Portal I get the following:

Delete command failed with http error code: 500

Best regards