While this works now on single file selection. With a larger multi-file selection (20 or so files) it is failing with the same error.
This doesn't happen every time, but happens pretty often. It appears there is a timeout set. If that timeout is exceeded, it will fail to add the files.
@raz0red Thanks for the note. It looks like this is a different scenario, so I've separated your latest comments to a new thread. We'll look into this one scenario and I'll follow up here once I have an update on this for you.
