After changing /geographicZones/search endpoint to accept POST requests Jasper templates need to be updated.
For now JasperTemplateParameter class has only 'selectExpression' field. To make POST requests we also need to have body and http method field, because default is GET.
Changes will need to be applied on report-ui, requisition service and report service.
Remember to update template parameter in requisition demo data in order to fix creating reports through UI.
I checked, and everything works correctly.