@Jude525: You're probably right about the posting. I often start posts hours before I finish them, because I get distracted. And I always write novels. :D.
I downloaded your lot and checked it with Cleaner (I always do that before installing anything), and there are several pieces of CC in that build. While CC won't stop a lot from uploading, CC that appears to the Exchange to be pirated store stuff will.
https://100307498-738675507175625689.preview.editmysite.com/uploads/1/0/0/3/100307498/hanging-gardens-cc_orig.png
Note the bottom item in the list: "Store/EP6VenueStageSet..." Although it may not be something pirated, I believe the Exchange thinks it is. You may have picked it up in something else you downloaded, and not realized where it came from.
I would go through the lot and try removing the pieces that are likely to be the CC, and then use Cleaner to check the lot before trying to upload. Save the file under a different save name, just in case it takes several hits to find the right items, so you can go back to previous versions if need be.
I'm going to try removing those items just using Cleaner, and then put it in my game. But if any of the pieces are critical to the build, it may end up looking awfully strange for me. :) I will let you know if I can figure anything out, but I probably won't be able to, since I wouldn't be familiar with how it necessarily SHOULD look.