Somehow all services are missing, including the SampleWorldCities and the Utilities and System folders.
We use Windows 10.8.1 Enterprise in AWS.
The ArcGIS Server Software Authorization shows that the following are active:
ArcGIS Server Advanced
ArcGIS Image Server
ArcGIS GeoEvent Server
Neither ArcGIS Server stop/start nor system reboot solved the problem.
Clearing the browser cache/history also didn't help.
The log shows that the problem occurred about 20 minutes after the "System/PublishingTools.GPServer" tool failed due not being able to copy data to server. Not sure if this is anything to do with the problem, but we set up the datastore and never copy data to server.
Any help/tips will be greatly appreciated.