diff --git a/redfish-core/lib/managers.hpp b/redfish-core/lib/managers.hpp
index a5e8c23..acaa40a 100644
--- a/redfish-core/lib/managers.hpp
+++ b/redfish-core/lib/managers.hpp
@@ -682,8 +682,7 @@
     if (config.empty())
     {
         BMCWEB_LOG_ERROR << "Empty Zones";
-        messages::propertyValueFormatError(response->res,
-                                           nlohmann::json::array(), "Zones");
+        messages::propertyValueFormatError(response->res, "[]", "Zones");
         return false;
     }
     for (auto& odata : config)
@@ -1601,8 +1600,8 @@
                 if (createNewObject && it.value() == nullptr)
                 {
                     // can't delete a non-existent object
-                    messages::propertyValueNotInList(response->res, it.value(),
-                                                     name);
+                    messages::propertyValueNotInList(response->res,
+                                                     it.value().dump(), name);
                     continue;
                 }
 
diff --git a/redfish-core/lib/metric_report_definition.hpp b/redfish-core/lib/metric_report_definition.hpp
index 4e9d78a..ab7c88b 100644
--- a/redfish-core/lib/metric_report_definition.hpp
+++ b/redfish-core/lib/metric_report_definition.hpp
@@ -316,8 +316,9 @@
                     {
                         metricProperties.emplace_back(uri);
                     }
-                    messages::propertyValueIncorrect(
-                        aResp->res, metricProperties, "MetricProperties");
+                    messages::propertyValueIncorrect(aResp->res,
+                                                     metricProperties.dump(),
+                                                     "MetricProperties");
                     return;
                 }
                 if (ec)