I used C# + ArcObjects to publish image service. I can successfully publish the image service. However, the data source of the image service is empty, as shown in the picture below. Thereby, the image service can not be visualized.

But I checked the image service configuration file, in which the path has been defined
"path": "\\\\server\\test.gdb\\Vulnerability",
I have registered this gdb on the arcgis server.
Any ideas how to solve the problem?