server/AyaNova/DataList/DataListFetcher.cs

@@ -72,6 +72,11 @@ namespace AyaNova.DataList
                             {
                                 //get the AyaObjectFieldDefinition
                                 DataListFieldDefinition f = DataList.FieldDefinitions.FirstOrDefault(z => z.FieldKey == TemplateField);
+                                if(f==null){
+                                   
+                                     log.LogError($"DataListFetcher:GetResponseAsync Template field '{TemplateField}' was NOT found in the field definitions for data list {DataList.ToString()}");
+                                    continue;
+                                }
                                 if (f.IsCustomField)
                                 {
                                     DataListField AyaField = new DataListField();