The warning was on the very last frame, and it came from the identical file to yours.

I stopped sharing the file this morning after 4 GB uploaded. It would have quickly exceeded my ISP's monthly limit of 60 GB, and I was getting close anyway.

I wonder if that is what happened to you? Check with your ISP's help desk to see if they have throttles in place once a user gets up to certain limits.

Good to hear all is OK. I was glad to check out the upload part of the new beta, and it looks like some minor inconsistencies need smoothing.

Cheers