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.
Your topic was Moved to it's current location / section as it is more suitable.
Could you also take a few moments to Learn How To Use The Forum (https://forum.arduino.cc/index.php?topic=148850.0).
Other general help and troubleshooting advice can be found here. (https://forum.arduino.cc/index.php?topic=52113.0)
It will help you get the best out of the forum in the future.
If you updated your OS at all recently there was a small issue that appears to have broken the app.
I know they are working hard to fix the issue.