Function App will not start or deployment will thrown an error as below:
'D:\home\site\wwwroot\host.json' is denied.
If you receive a System.UnauthorizedAccessException with a message Access to the path ‘D:\home\site\wwwroot\host.json’ is denied,
then mostly likely access from functionapp to the Azure Storage Account is being blocked where Azure Function is hosted.
1) Check if your functionapp is restricted to a specific VNET as shown below:
If it is not configured to a specific VNET then make sure the storage account where the function app is hosted has selected "ALL Networks" as shown below
If the function app is configured to a specific VNET then make sure the storage account where the function app is hosted has selected "Specific Networks" and the VNET is selected from the listed as shown below
