You are publishing a 3D tiles layer from a cache dataset, but the tileset.json file and 3D tiles content are not in the same directory. To publish a 3D tiles layer, the tileset.json file and 3D tiles content must reside in the same folder in the file share.
Note:
This analyzer appears only when publishing a 3D tiles layer that references a dataset in a file share. When publishing a 3D tiles dataset in a cloud store, you must also ensure that the tileset.json and 3D tiles content reside in the same directory.
Solution
Move the tileset.json file to the same directory as the content. You may need to open the tileset.json file in a text editor and update the paths to match the new directory structure.
Additional information
For more information, see Publish a 3D tiles layer from a cache dataset and Analyze your GIS resource.