Is this issue because ED's "Game Preview" state means we're prohibited from sharing clips and pics, or is it actually because Upload Studio and Upload are (still) screwed?
I tried sharing some Sunset Overdrive clips a few months ago. Upload Studio happily shared them to OneDrive, but absolutely *refused* to share them to Upload, instead preferring to repeatedly give me an error message. I tried rebooting, power cycling, removing and re-adding my XBL profile, etc. Xbox Support was of no use, and the issue was never resolved.
I know of other people with the same issue: Sharing to OneDrive works perfectly, but sharing to Upload does not.