diff --git a/app/src/main/java/io/zenandroid/onlinego/ui/composables/ScrollableDropDownMenu.kt b/app/src/main/java/io/zenandroid/onlinego/ui/composables/ScrollableDropDownMenu.kt
index 08609913..96f5b229 100644
--- a/app/src/main/java/io/zenandroid/onlinego/ui/composables/ScrollableDropDownMenu.kt
+++ b/app/src/main/java/io/zenandroid/onlinego/ui/composables/ScrollableDropDownMenu.kt
@@ -583,7 +583,11 @@ private class PopupLayout(
         params.x = popupPosition.x
         params.y = popupPosition.y
 
-        windowManager.updateViewLayout(this, params)
+        try {
+            windowManager.updateViewLayout(this, params)
+        } catch (_: Exception) {
+            // Ignore the exception if the view is not attached to the window.
+        }
     }
 
     /**
diff --git a/app/src/main/java/io/zenandroid/onlinego/ui/screens/main/MainActivity.kt b/app/src/main/java/io/zenandroid/onlinego/ui/screens/main/MainActivity.kt
index 4f928e37..5097af10 100644
--- a/app/src/main/java/io/zenandroid/onlinego/ui/screens/main/MainActivity.kt
+++ b/app/src/main/java/io/zenandroid/onlinego/ui/screens/main/MainActivity.kt
@@ -143,7 +143,13 @@ class MainActivity : AppCompatActivity(), MainContract.View {
                 NotificationChannelGroup("blitz", "Blitz"),
             )
                 .map { it.id }
-                .map(notificationManager::deleteNotificationChannelGroup)
+                .map {
+                    try {
+                        notificationManager.deleteNotificationChannelGroup(it)
+                    } catch (_: Exception) {
+                        // a bug in Oreo where deleting a non-existant notification channel group throws an NPE
+                    }
+                }
 
             notificationManager.createNotificationChannelGroup(
                 NotificationChannelGroup("your_turn", "Your Turn")