You need to install Scratch Link to allow other hardware (including our Go Direct^® Force and Acceleration Sensor (GDX-FOR)) to connect to Scratch 3.0 in a Chrome browser. An update to Chrome in the Fall of 2020 caused this connection to fail. To reestablish this communication you need to update Scratch Link to version 1.3.66.

Go to https://scratch.mit.edu/vernier and click on the “Direct download” link to ensure you get the latest version:

Note that the “Get it from Microsoft” link may give you an outdated version.