Multiple instances of this application cannot be opened at the same time.

Doing this will cause the two instances to share the same session information and become out of sync.

This session information is used to maintain your current position within the application, your current views, crumb trails, and other valuable information.

By changing state information in one window, you would be causing the other to no longer be in its expected state and errors would occur.

This error can also occur if you closed the tab of your previous session without logging out and are trying to log back in from a different tab.

To resolve this issue, you must close this browser window and open a new one.