Attempt to navigate to icelandmag.is. If the website loads successfully, identify the main categories or sections available on the homepage. If it fails to load, report the exact error message encountered and state that the task cannot be completed.
Navigate to 'https://icelandmag.is' If the website loads, identify and list the main navigation categories or sections. If the website fails to load, identify the exact error message displayed. State the identified categories/sections or report the error message and inability to complete the task.
If the website loads successfully, list at least three main navigation categories or sections from the homepage. If the website fails to load, accurately report the exact error message: 'net::ERR_CERT_DATE_INVALID'. State whether the task was completed or why it could not be completed.