Denuvo is an anti-tamper technology and DRM (digital rights management) system. It limits a game to activations on 5 different PCs within 24 hours.
Each new Boosteroid session is detected as a new device, so you can launch games protected by Denuvo no more than 5 times in 24 hours. Lists of games that use Denuvo can be found online.
When you reach the limit, you’ll see an error like the one below. Unfortunately, we can’t affect this limitation in any way. The only solution is to wait 24 hours until the limit is reset.
The window title usually includes the game name, and the link may look slightly different. If you open the link in your session, a page with more details will appear. You can see what this page looks like here. Its design may vary between games, but it always contains the message “Currently your game purchase cannot be re-validated successfully, please wait 24 hours and try again.”