Approval Activity Error

2018-10-26 12:11:52,507 DEBUG [com.novell.soa.af.impl.core.DataItemEvaluator] (RBPM pool-1-workflow engine-ND-thread-10) [RBPM] evaluating target expression: wi.createXPath("flow-data/AD_EXTERNAL/statusCode").setValue("200")
2018-10-26 12:11:52,507 DEBUG [com.novell.soa.af.impl.core.DataItemEvaluator] (RBPM pool-1-workflow engine-ND-thread-10) [RBPM] result: com.novell.soa.script.mozilla.javascript.Undefined@4c681682
2018-10-26 12:11:52,507 DEBUG [com.novell.soa.af.impl.core.DataItemEvaluator] (RBPM pool-1-workflow engine-ND-thread-10) [RBPM] evaluating target expression: wi.createXPath("flow-data/AD_EXTERNAL/contentType").setValue("application/json;charset=UTF-8")
2018-10-26 12:11:52,507 DEBUG [com.novell.soa.af.impl.core.DataItemEvaluator] (RBPM pool-1-workflow engine-ND-thread-10) [RBPM] result: com.novell.soa.script.mozilla.javascript.Undefined@4c681682
2018-10-26 12:11:52,508 DEBUG [com.novell.soa.af.impl.core.DataItemEvaluator] (RBPM pool-1-workflow engine-ND-thread-10) [RBPM] evaluating target expression: wi.createXPath("flow-data/AD_EXTERNAL/content").setValue("{\"result\":{\"status_sys_id\":\"c4a19a4bdb9da380b30af6e9af9619c0\",\"status_link\":\"x_malb_netiq_netiq_provisioning.do?sys_id=c4a19a4bdb9da380b30af6e9af9619c0