The Address Book custom properties couldn't be parsed. Invalid element found in "%1" at line number ="%2" position = "%3". ...

The Address Book custom properties couldn't be parsed. 

Invalid element found in "%1" at line number ="%2" position = "%3". The custom properties couldn't be parsed because an invalid element was encountered. The only element that can have attributes in the custom properties file is "customProperty". If this error isn't addressed, users won't be able to view the custom properties. The Help and Support Center provides information about how to troubleshoot this issue.