update

TEAMModelOS.SDK/Models/Service/Common/TeacherService.cs

@@ -149,7 +149,7 @@ namespace TEAMModelOS.Services
                                 schoolExtobj.area = area;
                             }
                             var sctch = await client.GetContainer(Constant.TEAMModelOS, "School").ReadItemStreamAsync(id, new PartitionKey($"Teacher-{sc.schoolId}"));
-                            if (sctch.Status == 200)
+                            if (sctch.Status == 200  && sctch!= null  && sctch.ContentStream!=null)
                             {
                                 var jsonDoc = await JsonDocument.ParseAsync(sctch.ContentStream);
                                 SchoolTeacher schoolTeacher = jsonDoc.RootElement.ToObject<SchoolTeacher>();