In create.arduino.cc (code online) there is an error message:
No Chrome App Connection. Uploading is disable until you reconnect.
There is a button to install an app. The app is Arduino Create which has a fee. Everything I read said I could program from a chromebook with the free tools.
Have connected with support from Elegoo (since the board came in an Elegoo kit) and twice they have failed to understand that this is for a Chromebook which has very little control over the USB port.
Many internet searches indicate it is easy to use the web editor with a Chromebook to connect yet none of the solutions have worked so far.