diff --git a/plugins/UM3NetworkPrinting/resources/qml/MonitorConfigOverrideDialog.qml b/plugins/UM3NetworkPrinting/resources/qml/MonitorConfigOverrideDialog.qml
index 1b9a03ea99..6a32310dd5 100644
--- a/plugins/UM3NetworkPrinting/resources/qml/MonitorConfigOverrideDialog.qml
+++ b/plugins/UM3NetworkPrinting/resources/qml/MonitorConfigOverrideDialog.qml
@@ -61,7 +61,7 @@ UM.Dialog
             var topLine
             if (materialsAreKnown(printer.activePrintJob))
             {
-                topLine = catalog.i18ncp("@label", "The assigned printer, %1, requires the following configuration change:", "The assigned printer, %1, requires the following configuration changes:").arg(printer.name)
+                topLine = catalog.i18ncp("@label", "The assigned printer, %1, requires the following configuration change:", "The assigned printer, %1, requires the following configuration changes:", printer.activePrintJob.configurationChanges.length).arg(printer.name)
             }
             else
             {
@@ -89,8 +89,10 @@ UM.Dialog
                     default:
                         text = "unknown"
                 }
-                result += "<p><b>" + text + "</b></p>"
+                result += "<p><b>" + text + "</b></p>\n\n"
             }
+            var bottomLine = catalog.i18nc("@label", "Override will use the specified settings with the existing printer configuration. This may result in a failed print.")
+            result += "<p>" + bottomLine + "</p>\n\n"
             return result
         }
     }
diff --git a/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py b/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py
index 056f8ef550..5e43b602cc 100644
--- a/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py
+++ b/plugins/UM3NetworkPrinting/src/ClusterUM3OutputDevice.py
@@ -551,7 +551,24 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
 
     def _createMaterialOutputModel(self, material_data: Dict[str, Any]) -> "MaterialOutputModel":
         material_manager = CuraApplication.getInstance().getMaterialManager()
-        material_group_list = material_manager.getMaterialGroupListByGUID(material_data["guid"])
+        material_group_list = None
+
+        # Avoid crashing if there is no "guid" field in the metadata
+        material_guid = material_data.get("guid")
+        if material_guid:
+            material_group_list = material_manager.getMaterialGroupListByGUID(material_guid)
+
+        # This can happen if the connected machine has no material in one or more extruders (if GUID is empty), or the		
+        # material is unknown to Cura, so we should return an "empty" or "unknown" material model.		
+        if material_group_list is None:
+            material_name = i18n_catalog.i18nc("@label:material", "Empty") if len(material_data.get("guid", "")) == 0 \
+                        else i18n_catalog.i18nc("@label:material", "Unknown")
+            return MaterialOutputModel(guid = material_data.get("guid", ""),
+                                        type = material_data.get("type", ""),
+                                        color = material_data.get("color", ""),
+                                        brand = material_data.get("brand", ""),
+                                        name = material_data.get("name", material_name)
+                                        )
 
         # Sort the material groups by "is_read_only = True" first, and then the name alphabetically.
         read_only_material_group_list = list(filter(lambda x: x.is_read_only, material_group_list))
@@ -577,9 +594,10 @@ class ClusterUM3OutputDevice(NetworkedPrinterOutputDevice):
             color = material_data["color"]
             brand = material_data["brand"]
             material_type = material_data["material"]
-            name = "Empty" if material_data["material"] == "empty" else "Unknown"
-        return MaterialOutputModel(guid=material_data["guid"], type=material_type,
-                                       brand=brand, color=color, name=name)
+            name = i18n_catalog.i18nc("@label:material", "Empty") if material_data["material"] == "empty" \
+                else i18n_catalog.i18nc("@label:material", "Unknown")
+        return MaterialOutputModel(guid = material_data["guid"], type = material_type,
+                                   brand = brand, color = color, name = name)
 
     def _updatePrinter(self, printer: PrinterOutputModel, data: Dict[str, Any]) -> None:
         # For some unknown reason the cluster wants UUID for everything, except for sending a job directly to a printer.
diff --git a/resources/qml/ExpandableComponent.qml b/resources/qml/ExpandableComponent.qml
index 2b07aa7d37..afe15bcb1d 100644
--- a/resources/qml/ExpandableComponent.qml
+++ b/resources/qml/ExpandableComponent.qml
@@ -88,7 +88,23 @@ Item
     {
         target: background
         property: "color"
-        value: enabled ? (expanded ? headerActiveColor : headerBackgroundColor) : UM.Theme.getColor("disabled")
+        value:
+        {
+            return base.enabled ? (expanded ? headerActiveColor : headerBackgroundColor) : UM.Theme.getColor("disabled")
+        }
+    }
+
+    // The panel needs to close when it becomes disabled
+    Connections
+    {
+        target: base
+        onEnabledChanged:
+        {
+            if (!base.enabled && expanded)
+            {
+                toggleContent()
+            }
+        }
     }
 
     implicitHeight: 100 * screenScaleFactor
diff --git a/resources/qml/ExpandablePopup.qml b/resources/qml/ExpandablePopup.qml
index 4bf1684f18..2d2665373e 100644
--- a/resources/qml/ExpandablePopup.qml
+++ b/resources/qml/ExpandablePopup.qml
@@ -94,7 +94,20 @@ Item
     {
         target: background
         property: "color"
-        value: enabled ? headerBackgroundColor : UM.Theme.getColor("disabled")
+        value: base.enabled ? headerBackgroundColor : UM.Theme.getColor("disabled")
+    }
+
+    // The panel needs to close when it becomes disabled
+    Connections
+    {
+        target: base
+        onEnabledChanged:
+        {
+            if (!base.enabled && expanded)
+            {
+                toggleContent()
+            }
+        }
     }
 
     implicitHeight: 100 * screenScaleFactor