Close Roblox completely
Open the Microsoft Store if you installed Roblox from there
Go to Library
Click Get updates
Install any Roblox update if it appears
Open Roblox again after the update finishes
If you use the Roblox website version, open Roblox Player from your browser or desktop shortcut
If prompted, let Roblox update automatically
If Roblox does not update, uninstall Roblox from Windows
Restart your PC
Reinstall Roblox from the official Roblox website or Microsoft Store
Launch Roblox and sign in again