I can't open the game

When I launch my game it's say "couldn't find valid license key. Please try reinstalling the product" and when i click OK it's say "Failed to initialiaze game engine. The game cannot start". How I can fix that PS: I have already reinstall and it's didn't works

guys looking for serial try this one:
2DF63334-AD363738-39E6A143-446F046B
And to convert bak into iso use this(it is small and portable):
https://www.softwareok.com/?seite=Freeware/WinBin2Iso

What is serial key?
1st i have to convert it into iso formal then serialkey is missing......... ;(