Typically this is caused by either the wrong login URL being used or cached browser data confusing the system, most often resulting from having recently logged into a different ARIVE account on the same computer. In some cases it may also be caused by using the wrong login URL.

Solution:

Try logging in through an Incognito/Private Browsing window. If you are able to log in successfully through an incognito window but get an Unauthorized Access message when logging in through a regular browser window, you'll need to clear your browser cache and cookies (making sure to set the time period to All Time or Lifetime). Exactly how to do this varies slightly depending on your browser, see below for the most common ones.

Google Chrome:

Internet Explorer:

Safari:

Once you have cleared your browser cache and cookies, you should be able to log in successfully.