Stood up a Windows Node 10.14 web app a while back, deployed PWA code to it, and everything was fine. Suddenly, attempting to browse to the application results in a "You do not have permission to view this directory or page" error message. Checking the web app configuration, the Stack setting displays as blank and clicking the dropdown displays no Node options.
I then deleted the original web app instance and recreated another with the same name. During the creation process Node stack options were available. Selected Node 10.14. Web app instance was created successfully, but when I check the resulting web app configuration I see the same blank Stack value and Node-less list of options.
This is extremely frustrating! How does this happen?