Error: connection reference <CONNECTIONREFERENCE name> type <TYPE> and subtype <SUBTYPE> is not valid for the extension.
In the XML file, you specified CONNECTIONTYPE and CONNECTIONSUBTYPE attributes in the specified CONNECTIONREFERENCE element that are not valid for the TYPE and SUBTYPE attributes of the SESSIONEXTENSION element.
Edit the XML file, and verify the type and subtypes of the CONNECTIONREFERENCE and SESSIONEXTENSION elements are compatible. Or, export the object again and then import it.