diff --git a/cura/SingleInstance.py b/cura/SingleInstance.py
index af98869ad7..61ab1204fe 100644
--- a/cura/SingleInstance.py
+++ b/cura/SingleInstance.py
@@ -29,7 +29,7 @@ class SingleInstance:
         single_instance_socket.connectToServer("ultimaker-cura")
         single_instance_socket.waitForConnected(msecs = 3000)  # wait for 3 seconds
 
-        if single_instance_socket.state() != QLocalSocket.ConnectedState:
+        if single_instance_socket.state() != QLocalSocket.LocalSocketState.ConnectedState:
             return False
 
         # We only send the files that need to be opened.
@@ -37,7 +37,7 @@ class SingleInstance:
             Logger.log("i", "No file need to be opened, do nothing.")
             return True
 
-        if single_instance_socket.state() == QLocalSocket.ConnectedState:
+        if single_instance_socket.state() == QLocalSocket.LocalSocketState.ConnectedState:
             Logger.log("i", "Connection has been made to the single-instance Cura socket.")
 
             # Protocol is one line of JSON terminated with a carriage return.
diff --git a/plugins/DigitalLibrary/resources/qml/SelectProjectPage.qml b/plugins/DigitalLibrary/resources/qml/SelectProjectPage.qml
index ed632124e5..60beb66e11 100644
--- a/plugins/DigitalLibrary/resources/qml/SelectProjectPage.qml
+++ b/plugins/DigitalLibrary/resources/qml/SelectProjectPage.qml
@@ -6,7 +6,7 @@ import QtQuick.Window 2.2
 import QtQuick.Controls 2.3
 import QtQuick.Layouts 1.1
 
-import UM 1.2 as UM
+import UM 1.6 as UM
 import Cura 1.7 as Cura
 
 import DigitalFactory 1.0 as DF
@@ -148,29 +148,7 @@ Item
             contentHeight: projectsListView.implicitHeight
             anchors.fill: parent
 
-            ScrollBar.vertical: ScrollBar
-            {
-                // Vertical ScrollBar, styled similarly to the scrollBar in the settings panel
-                id: verticalScrollBar
-                visible: flickableView.contentHeight > flickableView.height
-
-                background: Rectangle
-                {
-                    implicitWidth: UM.Theme.getSize("scrollbar").width
-                    radius: Math.round(implicitWidth / 2)
-                    color: UM.Theme.getColor("scrollbar_background")
-                }
-
-                contentItem: Rectangle
-                {
-                    id: scrollViewHandle
-                    implicitWidth: UM.Theme.getSize("scrollbar").width
-                    radius: Math.round(implicitWidth / 2)
-
-                    color: verticalScrollBar.pressed ? UM.Theme.getColor("scrollbar_handle_down") : verticalScrollBar.hovered ? UM.Theme.getColor("scrollbar_handle_hover") : UM.Theme.getColor("scrollbar_handle")
-                    Behavior on color { ColorAnimation { duration: 50; } }
-                }
-            }
+            ScrollBar.vertical: UM.ScrollBar { id: verticalScrollBar }
 
             Column
             {
diff --git a/plugins/Marketplace/RemotePackageList.py b/plugins/Marketplace/RemotePackageList.py
index 67ba8c75da..c20efabbc2 100644
--- a/plugins/Marketplace/RemotePackageList.py
+++ b/plugins/Marketplace/RemotePackageList.py
@@ -138,9 +138,10 @@ class RemotePackageList(PackageList):
         :param reply: The reply with packages. This will most likely be incomplete and should be ignored.
         :param error: The error status of the request.
         """
-        if error == QNetworkReply.NetworkError.OperationCanceledError:
+        if error == QNetworkReply.NetworkError.OperationCanceledError or error == QNetworkReply.NetworkError.ProtocolUnknownError:
             Logger.debug("Cancelled request for packages.")
             self._ongoing_requests["get_packages"] = None
+            self.setIsLoading(False)
             return  # Don't show an error about this to the user.
         Logger.error("Could not reach Marketplace server.")
         self.setErrorMessage(catalog.i18nc("@info:error", "Could not reach Marketplace."))
diff --git a/plugins/Marketplace/resources/qml/Packages.qml b/plugins/Marketplace/resources/qml/Packages.qml
index d86536639c..74a18bccd3 100644
--- a/plugins/Marketplace/resources/qml/Packages.qml
+++ b/plugins/Marketplace/resources/qml/Packages.qml
@@ -1,9 +1,10 @@
-// Copyright (c) 2021 Ultimaker B.V.
+// Copyright (c) 2022 Ultimaker B.V.
 // Cura is released under the terms of the LGPLv3 or higher.
 
 import QtQuick 2.15
 import QtQuick.Controls 2.15
-import UM 1.4 as UM
+
+import UM 1.6 as UM
 
 
 ListView
@@ -51,23 +52,7 @@ ListView
         }
     }
 
-    ScrollBar.vertical: ScrollBar
-    {
-        // Vertical ScrollBar, styled similarly to the scrollBar in the settings panel
-        id: verticalScrollBar
-        visible: packages.contentHeight > packages.height
-        anchors.right: parent.right
-        background: Item {}
-
-        contentItem: Rectangle
-        {
-            id: scrollViewHandle
-            implicitWidth: UM.Theme.getSize("scrollbar").width
-            radius: Math.round(implicitWidth / 2)
-            color: verticalScrollBar.pressed ? UM.Theme.getColor("scrollbar_handle_down") : verticalScrollBar.hovered ? UM.Theme.getColor("scrollbar_handle_hover") : UM.Theme.getColor("scrollbar_handle")
-            Behavior on color { ColorAnimation { duration: 50; } }
-        }
-    }
+    ScrollBar.vertical: UM.ScrollBar { id: verticalScrollBar }
 
     delegate: MouseArea
     {
diff --git a/resources/qml/PrinterSelector/MachineSelectorButton.qml b/resources/qml/PrinterSelector/MachineSelectorButton.qml
index 74c833f691..cd1f3cc574 100644
--- a/resources/qml/PrinterSelector/MachineSelectorButton.qml
+++ b/resources/qml/PrinterSelector/MachineSelectorButton.qml
@@ -40,7 +40,7 @@ Button
 
     contentItem: Item
     {
-        width: machineSelectorButton.width - machineSelectorButton.leftPadding
+        width: machineSelectorButton.width - machineSelectorButton.leftPadding - machineSelectorButton.rightPadding
         height: UM.Theme.getSize("action_button").height
 
         UM.Label