The following applies only to the packaged Graphical Analysis app, not the Progressive Web App (PWA)

One reason why a Chromebook won’t connect to a LabQuest device or a Go Direct device is that the Android version of Graphical Analysis (from Google Play) was installed rather than the Chrome version (from the Chrome Web Store). Some Chromebooks are able to run Android applications, but if you have installed the Android version of Graphical Analysis, or allow the USB device to connect to the Android system, Graphical Analysis will not connect to USB devices.

There is also an order-of-operations behavior that can cause the Chromebook to not see the USB device. To avoid this, always launch the Graphical Analysis app before connecting Go Direct sensors or LabQuest devices by USB. If you make the USB connection, and then launch Graphical Analysis, the devices will not be found. Recover by disconnecting, quitting and re-launching Graphical Analysis, and only then make the USB connection. Use of the PWA version avoids this behavior, and all ChromeOS users must migrate to the PWA version of Graphical Analysis by 2025.

Regarding both the packaged app and the PWA

We have seen Chromebooks fail to connect to USB devices, and then resume working after performing a Powerwash to reset the Chromebook. If other troubleshooting has failed, try this step.

My Chromebook won't connect to USB devices when using Graphical Analysis, Spectral Analysis, or Instrumental Analysis.
Google will stop supporting Chrome Packaged Apps for ChromeOS.
What is the difference between the Progressive Web App and Chrome Packaged App versions of Graphical Analysis and other Vernier apps?