If possible, you should install the app as the admin on your computer. To find out whether this is the problem, you should uninstall Roblox and then install the latest version available on the Roblox website.
If a world supports VR but you can’t activate VR mode despite having established a link between your PC and headset, you may be running an outdated version of Roblox. But for all worlds compatible with VR, you’ll see an “Enable VR” option in the in-game settings. For worlds that don’t support VR, you’ll play on a virtual desktop on your headset. Once you’ve linked your PC to the Quest 2 headset successfully, you should be able to play any Roblox game on your headset.
Here’s how to play your Roblox classics on Oculus Quest 2 with the help of your PC and a link cable: To do so, find a Roblox title, click the play button, and then put on your headset.