Hi Matt, I'm having the same problem. I had tried the whole process on my trial account and everything worked find. However, now I'm trying to repeat the same process on the organization's account. The tile packages were created on the desktop and uploaded using a python script, but now that I try to publish one of the tile packages it only goes up to 26%. I had left it to run over night and when I came back I was signed out of ArcGIS online. I signed back in and there has been no progress passed 26% and it shows that its still "publishing tiles"! Any ideas how to solve this issue?
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