I’m having the same exact issue!!! I just bought a new theme & it won’t let me upload it…
How frustrating 🙁
I managed to upload other simple themes no problem, but this other one will not work. Its 8.8MB and the others were under 1MB. I don’t know if that has anything to do with it.
Anyone know of a solution?
***UPDATE***
I figured out both why my individual product images weren’t showing (they were too small) and how to set up category Shop pages.