Error 6740: The machine was not reachable.
The only error is a certificate issue.
IIS Manager
The default website has stopped.
When restart get an error: Another website might be using the same port.
I can load ArcGIS Server Admin/Manage
Under home-machines-URL
The status is started, but not reachable, when launch the REST URL.
I opened arcgis/admin
Then opened the Webadaptor details, saw the port number was 80 not 443.
I found an article that provides information to update the Port number, will try this
https://enterprise.arcgis.com/en/web-adaptor/latest/install/iis/configure-arcgis-web-adaptor-portal.htm
