Fix null ref in elastic
Fix null ref in elastic

Janiels/Opserver,opserver/Opserver,maurobennici/Opserver,baflynn/Opserver,vbfox/Opserver,mqbk/Opserver,wuanunet/Opserver,jeddytier4/Opserver,volkd/Opserver,volkd/Opserver,mqbk/Opserver,geffzhang/Opserver,huoxudong125/Opserver,Janiels/Opserver,a9261/Opserver,agrath/Opserver,opserver/Opserver,rducom/Opserver,rducom/Opserver,GABeech/Opserver,michaelholzheimer/Opserver,jeddytier4/Opserver,manesiotise/Opserver,dteg/Opserver,IDisposable/Opserver,VictoriaD/Opserver,hotrannam/Opserver,vebin/Opserver,18098924759/Opserver,geffzhang/Opserver,dteg/Opserver,hotrannam/Opserver,huoxudong125/Opserver,vebin/Opserver,a9261/Opserver,michaelholzheimer/Opserver,manesiotise/Opserver,vbfox/Opserver,18098924759/Opserver,VictoriaD/Opserver,wuanunet/Opserver,manesiotise/Opserver,opserver/Opserver,maurobennici/Opserver,baflynn/Opserver,GABeech/Opserver,IDisposable/Opserver,agrath/Opserver