How can I troubleshoot a 403 error on my Chromebook when accessing a website?

First, clear your browser's cache and cookies. Then, try accessing the website in Incognito mode to rule out browser extensions as the cause. Verify you are logged in with the correct credentials if the site requires authentication. Check your Chromebook's network connection and ensure you are not using a VPN or proxy that may be causing issues. Finally, contact the website's administrator if the problem persists.