diff --git a/csharp/App/Backend/DataTypes/Methods/Session.cs b/csharp/App/Backend/DataTypes/Methods/Session.cs
index 4856816cd..2c259ffc9 100644
--- a/csharp/App/Backend/DataTypes/Methods/Session.cs
+++ b/csharp/App/Backend/DataTypes/Methods/Session.cs
@@ -55,10 +55,9 @@ public static class SessionMethods
         var installation = Db.GetInstallationById(installationId);
         var parent = Db.GetFolderById(parentId);
 
-        if(installation.ParentId == parentId) return false;
+        if(installation == null || installation.ParentId == parentId) return false;
         
         return user is not null
-               && installation is not null 
                && user.HasWriteAccess 
                && user.HasAccessTo(installation)
                && user.HasAccessTo(parent)