If you want to use a system font, try switching off your machine, waiting a few minutes, and boot again.
If you are using Adobe Cloud Services, make sure all apps are updated and restart your machine. Make sure you are logged in with your Adobe ID in the Creative Cloud desktop app. You can navigate to Preferences > General and log out and log in again. Make sure synching is turned on on your machine. In the Creative Cloud app, navigate to Preferences > Creative Cloud > Files and check that Sync is active. If the problem persists, check out this troubleshooting guide on Adobe’s website.