Sometimes, it’s possible that nothing happens after clicking “Setup Upload Definitions” in the menu:
We don’t know why exactly this is happening but we are at least able to replicate the problem on our side when the user is logged into multiple Google accounts in the same browser – namely in Chrome. The issue does not happen when we are logged just into 1 account OR when we are using incognito mode.
So please, if you are having this issue, please try incognito mode.
It looks like this is a browser issue rather than a problem of the uploader.