Offers

Hi, got the below error when preparing a delivery. What could be the possible reasons?

XSV-350122 An error occurred and the process has been stopped.
SOP-330011 Error while executing the method 'PrepareMessage' of service 'nms:delivery'.
SOP-330011 Error while executing the method 'PrepareMessageImpl' of service 'nms:delivery'.
DLV-490027 An error occurred when generating offers from the identifier '' associated delivery.
SOP-330011 Error while executing the method 'GenerateTempPropositions' of service 'nms:interaction'.
SOP-330011 Error while executing the method 'BuildQuery' of service 'xtk:queryDef'.
XTK-170036 Unable to parse expression '[rcpGrpRel/@group-id] = 708564510 and [rcpGrpRel/rcpGroup/@type]=0'.
Element 'rcpGrpRel' unknown (see definition of schema 'Offer simulation targeting (temp:target)').