We've recently identified a bug that only occurs in Chrome when uploading files to the ACS Network.
When you go to create a file you should see a way to select a file. In other browsers, selecting "Click on a link to select a file"
In other browsers, you see a window with which to select your files:
In Chrome, this window does not come up. It is a tricky problem that we have not been able to pinpoint. The work around is that you open a window showing your files and drag and drop them into this space, or use a different browser.
We apologize for any inconvenience this may cause and will continue trying to understand this issue.