GOG GALAXY failed to install the game's dependencies at the end of the installation.
Firstly, please shutdown GOG GALAXY (cogwheel icon in the top left →Exit) and open the app's installation folder (by default in C:\Program Files (x86)\GOG GALAXY):
Please search for a folder called "Dependencies-Temp", rename it to "Dependencies", and if you will be asked - merge it with the original "Dependencies".
Launch GOG GALAXY again and check if the same problem persists.
Alternatively, you could also try installing the affected game with the offline installer and import it afterwards to GOG GALAXY:
- open your internet browser and access the GOG library (https://www.gog.com/account)
- select the game
- click below DOWNLOAD OFFLINE BACKUP GAME INSTALLERS
- download all necessary setup files
- open your download folder and run the game's setup
- after completion, wait a moment until the game is imported to your INSTALLED view in GOG GALAXY
In case if you are unable to find the mentioned folder or the issue still persists please contact us here.