I'm trying to export satellite imagery from a WMS, explicitly made for export: World Imagery (for Export), found here: http://www.arcgis.com/home/item.html?id=226d23f076da478bba4589e7eae95952
The service URL is https://tiledbasemaps.arcgis.com/arcgis/rest/services/World_Imagery/MapServer and loads fine in Pro. I'm using the Geoprocessing tool "Create Map Tile Package" to create a tpk (you apparently can't export plain image tiles, which would be far more useful) but it returns " Layer type is not supported: Map/World_Imagery".
There's no other data in the project that could interfere. The map projection matches the WMS.