When I try to upload Microsoft Office BusinessPro installer it gets to 99% and then hangs. I don't seem to have any issue with any other packages, just this one. I tried leaving overnight on one attempt and it was still on 99% in the morning.
I had the same issue last month with the previous released package. (sourced from https://macadmins.software)
I've tried this from our work network and from home and have the same issue. Also tried redownloading the package a couple of times. Even tried renaming it. Still the same issue.
Oddly enough, a colleague of mine was able to upload without any issue.