check if domainobejct before listening for status

src/ui/inspector/ObjectName.vue

@@ -97,10 +97,13 @@ export default {
             } else {
                 this.multiSelect = false;
                 this.domainObject = selection[0][0].context.item;
+
+                if (this.domainObject) {
                     this.keyString = this.openmct.objects.makeKeyString(this.domainObject.identifier);
                     this.status = this.openmct.status.get(this.keyString);
                     this.statusUnsubscribe = this.openmct.status.observe(this.keyString, this.updateStatus);
                 }
+            }
         },
         resetDomainObject() {
             this.domainObject = {};