Did you try to reset the upgrade after restoring the SUM directory from the original system?
The error in the first screenshot can be caused due to the fact there could be a flag under "Protection against SAP upgrade" in Tx SCC4 for the client.
Try to remove the flag (un-check the box) and see if that helps. This will NOT reset the upgrade.
The second error is most likely due to the fact the upgrade directory is not accessible.
Regards
RB