These are possible solutions to help solve the issue of roblox keeps crashing unexpected error:

1. Restart Roblox and your device.

2. By uninstalling temporary files and folders in Roblox, the cache can be cleared.

3. Update graphics drivers and Windows.

4. Try to disable the antivirus/firewall for some time to know if it is causing the interference.

5. Reinstall Roblox for a clean setup.