Oops, something went wrong
(number) of your assets failed to upload. Please delete any assets marked with a failed icon (ICON) and re-upload them or try a different asset.
The software does not mark anything with the ICON and I have no idea what assets is refering to!
It does not give any other options than to create a new presentation from start.
This is quite anoying and I would considerate using adobe online again for all this type of issue.

