I have an Azure AppService using Ubuntu OS. It also uses an Azure Managed certificate, but when it loads, it fails with the following error. Not that I think it matters, this site is using ACR container. The weird issue is that I have another site at a different URL, using a different Azure managed cert, but it runs with no issue. The Dockerfile config are basically identical, save for the difference in URL.
ERROR: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date.