If he can’t log into chromebook from the browser try these solutions:
it is important that both Chrome OS is up-to-date check that it has been updated.
if your trying to use chrome remote desktop try this:
To find out whether or not your particular model supports Google Play apps, take the following steps.
- Click on your user photo, usually located in the bottom right-hand corner of the screen.
- When the pop-out window appears, click on the Settings icon – represented by a gear.
- Chrome OS's Settings interface should now be displayed. Scroll down and search for a section labeled Google Play Store. If you cannot find this section, it likely means that your Chromebook model does not support Google Play Store apps and you'll need to try one of the alternative methods found later in this article.
- If you do locate this section and it is not already enabled, activate it by selecting the TURN ON button and agreeing to the Google Play Terms of Service.
- Now that you've enabled Google Play on your Chromebook, it's time to install Roblox.
- Open your Chrome browser.
- Navigate to the Roblox page in the Google Play Store.
- Click on the INSTALL button.
- A progress bar will now be displayed, detailing the status of the file download process. Once complete, Roblox will automatically be installed.
- After installation is completed, select the OPEN button.
- Roblox will now launch and prompt you to either login or sign up for an account. To play Roblox at any time going forward, click on the Launcher button in the bottom left-hand corner of your screen and choose the game's icon.
- Sorry if its a bit long but i hope this works for you!