Go to Chrono Trigger in your library, right-click on the title on the game list, then click on "properties", go to "controller" at the bottom right and enable steam input.


This has been confirmed to work for me on Windows 10, version 21H1 (press Windows key + R and enter "winver.exe" to check your windows version), but if this doesn't solve the issue, then try the solution posted by PCGamingWiki[www.pcgamingwiki.com].