Save game not valid ;(

When I extract my cloud save game and open with editor an error pop up with Save game not valid ;(, help?

Probably you used HXD / Greenluma. Its usally ,, break " the game files, so you have to close the greenluma, open the ORIGINAL steam, whereh no modification was found, and play 1 killer game, without any modification. After a killer game, your save file be fine again.