This error can occur when the date format is not set as 'dd mm yy'.
To correct this error:
* Go to the 'Design' menu and select 'Text'
* Click the 'Go To' button, and enter Phase '-1' and ID 2247
* Click 'OK'
* Click the 'Restore Default' button so that the prompt resets to 'dd mm yy'
* Click 'OK'
* Update your site.
To correct this error:
* Go to the 'Design' menu and select 'Text'
* Click the 'Go To' button, and enter Phase '-1' and ID 2247
* Click 'OK'
* Click the 'Restore Default' button so that the prompt resets to 'dd mm yy'
* Click 'OK'
* Update your site.