diff --git a/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDeviceManager.py b/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDeviceManager.py
index d2968acb2c..8c81ce39a8 100644
--- a/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDeviceManager.py
+++ b/plugins/UM3NetworkPrinting/src/Cloud/CloudOutputDeviceManager.py
@@ -51,7 +51,7 @@ class CloudOutputDeviceManager:
         self._account = CuraApplication.getInstance().getCuraAPI().account  # type: Account
         self._api = CloudApiClient(CuraApplication.getInstance(), on_error = lambda error: Logger.log("e", str(error)))
         self._account.loginStateChanged.connect(self._onLoginStateChanged)
-        self.removed_printers_message = None  # type: Optional[Message]
+        self._removed_printers_message = None  # type: Optional[Message]
 
         # Ensure we don't start twice.
         self._running = False
@@ -123,9 +123,9 @@ class CloudOutputDeviceManager:
         self._onDevicesDiscovered(new_clusters)
 
         # Hide the current removed_printers_message, if there is any
-        if self.removed_printers_message:
-            self.removed_printers_message.actionTriggered.disconnect(self._onRemovedPrintersMessageActionTriggered)
-            self.removed_printers_message.hide()
+        if self._removed_printers_message:
+            self._removed_printers_message.actionTriggered.disconnect(self._onRemovedPrintersMessageActionTriggered)
+            self._removed_printers_message.hide()
 
         # Remove the CloudOutput device for offline printers
         offline_device_keys = set(self._remote_clusters.keys()) - set(online_clusters.keys())
@@ -276,7 +276,7 @@ class CloudOutputDeviceManager:
             return
 
         # Generate message
-        self.removed_printers_message = Message(
+        self._removed_printers_message = Message(
                 title = self.I18N_CATALOG.i18ncp(
                         "info:status",
                         "Cloud connection is not available for a printer",
@@ -298,19 +298,19 @@ class CloudOutputDeviceManager:
                 "<a href='https://mycloud.ultimaker.com/'>Ultimaker Digital Factory</a>.",
                 device_names
         )
-        self.removed_printers_message.setText(message_text)
-        self.removed_printers_message.addAction("keep_printer_configurations_action",
-                               name = self.I18N_CATALOG.i18nc("@action:button", "Keep printer configurations"),
-                               icon = "",
-                               description = "Keep the configuration of the cloud printer(s) synced with Cura which are not linked to your account.",
-                               button_align = Message.ActionButtonAlignment.ALIGN_RIGHT)
-        self.removed_printers_message.addAction("remove_printers_action",
-                               name = self.I18N_CATALOG.i18nc("@action:button", "Remove printers"),
-                               icon = "",
-                               description = "Remove the cloud printer(s) which are not linked to your account.",
-                               button_style = Message.ActionButtonStyle.SECONDARY,
-                               button_align = Message.ActionButtonAlignment.ALIGN_LEFT)
-        self.removed_printers_message.actionTriggered.connect(self._onRemovedPrintersMessageActionTriggered)
+        self._removed_printers_message.setText(message_text)
+        self._removed_printers_message.addAction("keep_printer_configurations_action",
+                                                 name = self.I18N_CATALOG.i18nc("@action:button", "Keep printer configurations"),
+                                                 icon = "",
+                                                 description = "Keep the configuration of the cloud printer(s) synced with Cura which are not linked to your account.",
+                                                 button_align = Message.ActionButtonAlignment.ALIGN_RIGHT)
+        self._removed_printers_message.addAction("remove_printers_action",
+                                                 name = self.I18N_CATALOG.i18nc("@action:button", "Remove printers"),
+                                                 icon = "",
+                                                 description = "Remove the cloud printer(s) which are not linked to your account.",
+                                                 button_style = Message.ActionButtonStyle.SECONDARY,
+                                                 button_align = Message.ActionButtonAlignment.ALIGN_LEFT)
+        self._removed_printers_message.actionTriggered.connect(self._onRemovedPrintersMessageActionTriggered)
 
         output_device_manager = CuraApplication.getInstance().getOutputDeviceManager()
 
@@ -327,7 +327,7 @@ class CloudOutputDeviceManager:
             # Update the printer's metadata to mark it as not linked to the account
             device.setMetaDataEntry(META_UM_LINKED_TO_ACCOUNT, False)
 
-        self.removed_printers_message.show()
+        self._removed_printers_message.show()
 
     def _onDiscoveredDeviceRemoved(self, device_id: str) -> None:
         device = self._remote_clusters.pop(device_id, None)  # type: Optional[CloudOutputDevice]