diff --git a/cura/Machines/Models/BaseMaterialsModel.py b/cura/Machines/Models/BaseMaterialsModel.py
index 1ad4da8513..1b06fa5d1a 100644
--- a/cura/Machines/Models/BaseMaterialsModel.py
+++ b/cura/Machines/Models/BaseMaterialsModel.py
@@ -12,10 +12,9 @@ def getAvailableMaterials(extruder_position: Optional[int] = None):
     from cura.CuraApplication import CuraApplication
     machine_manager = CuraApplication.getInstance().getMachineManager()
     extruder_manager = CuraApplication.getInstance().getExtruderManager()
+    material_manager = CuraApplication.getInstance().getMaterialManager()
 
-    material_manager = CuraApplication.getInstance()._material_manager
-
-    active_global_stack = machine_manager._global_container_stack
+    active_global_stack = machine_manager.activeMachine
     extruder_stack = extruder_manager.getActiveExtruderStack()
     if extruder_position is not None:
         if active_global_stack is not None:
diff --git a/cura/Machines/Models/BrandMaterialsModel.py b/cura/Machines/Models/BrandMaterialsModel.py
index 9e2aaa02e8..1edef672d4 100644
--- a/cura/Machines/Models/BrandMaterialsModel.py
+++ b/cura/Machines/Models/BrandMaterialsModel.py
@@ -37,7 +37,7 @@ class BrandMaterialsModel(ListModel):
         from cura.CuraApplication import CuraApplication
         self._machine_manager = CuraApplication.getInstance().getMachineManager()
         extruder_manager = CuraApplication.getInstance().getExtruderManager()
-        material_manager = CuraApplication.getInstance()._material_manager
+        material_manager = CuraApplication.getInstance().getMaterialManager()
 
         self._machine_manager.globalContainerChanged.connect(self._update)
         extruder_manager.activeExtruderChanged.connect(self._update)
diff --git a/cura/Machines/Models/GenericMaterialsModel.py b/cura/Machines/Models/GenericMaterialsModel.py
index dd18abe7c3..c15f88d59a 100644
--- a/cura/Machines/Models/GenericMaterialsModel.py
+++ b/cura/Machines/Models/GenericMaterialsModel.py
@@ -12,7 +12,7 @@ class GenericMaterialsModel(BaseMaterialsModel):
         from cura.CuraApplication import CuraApplication
         self._machine_manager = CuraApplication.getInstance().getMachineManager()
         self._extruder_manager = CuraApplication.getInstance().getExtruderManager()
-        self._material_manager = CuraApplication.getInstance()._material_manager
+        self._material_manager = CuraApplication.getInstance().getMaterialManager()
 
         self._machine_manager.globalContainerChanged.connect(self._update)
         self._extruder_manager.activeExtruderChanged.connect(self._update)
diff --git a/cura/Machines/Models/MaterialManagementModel.py b/cura/Machines/Models/MaterialManagementModel.py
index 35173129e0..cd1aa12427 100644
--- a/cura/Machines/Models/MaterialManagementModel.py
+++ b/cura/Machines/Models/MaterialManagementModel.py
@@ -53,7 +53,7 @@ class MaterialManagementModel(ListModel):
         self._container_registry = CuraApplication.getInstance().getContainerRegistry()
         self._machine_manager = CuraApplication.getInstance().getMachineManager()
         extruder_manager = CuraApplication.getInstance().getExtruderManager()
-        material_manager = CuraApplication.getInstance()._material_manager
+        material_manager = CuraApplication.getInstance().getMaterialManager()
 
         self._machine_manager.globalContainerChanged.connect(self._update)
         extruder_manager.activeExtruderChanged.connect(self._update)