GOG GALAXY is unable to detect the game's license on your account. It's likely that you haven't redeemed your game's code or you are logged under a ...
Make sure that you have the internet connection and GOG GALAXY is not blocked by your antivirus or/and Firewall. To do that please add the following ...
Launch GOG GALAXY again and check if the same problem persists. Alternatively, you could also try installing the affected game with the offline installer ...