Answer:
The main cause here is that your computer lacks the necessary tool, Unity Web Player, for playing 3D games. Install it, and you'll be free from those notifications. Check the download link and installation guide below.
* For Windows operating system: Download and install Unity Player.
* For Mac OS: Download and install Unity for Mac.
After completion, restart your browser, reopen the game, and the notifications will be gone. For more details, refer to the article on installing Unity Web Player for 3D gaming on Firefox, Chrome, and Cốc Cốc browsers.
Encountering game issues on various operating systems is not uncommon. It frequently happens with Windows or faulty games. Even with the latest operating system, Windows 10 Creators Update, facing game-related problems is normal. If you encounter this error, check out the guide on fixing game issues on Windows 10 Creators Update.