I created a tile package locally and uploaded it to ArcGIS online using the share geoprocessing tool. I received no error messages. However when I go look in My Contents it is not visible anywhere.
The package was very large at about 70GB and contained a Level of Detail down to 1:120 as the default basemap resolution is not close enough for our field guys to see infrastrure in a small area.
Strangely enough when I look at the geoprocessing results I see "Tool Succeeded: False" but no error messages. See attached.