Hi Wojciech Bubicz , thank you for reporting this. I confirm that this is a problem for standalone applicaitons only.  The development team will need to review it and then confirm if a solution can be provided.  I don't have a work around for this.

Adding Robert Cornea, Loredana Stoia 

Thank you for answering. When do you think we can expect the problem to be reviewed and possible solution confirmed?

Patrick Andrew Hartnett I have one more question - do you think that the workaround I proposed to delete first two <extension>...</extension> sections from Sdl.BestMatchService.TranslationProvider.plugin.xml or deleting whole Sdl.BestMatchService.TranslationProvider.plugin.xml file can cause any problems?

Hi Wojciech Bubicz ,  The development team have reported that there will be a fix in place for the Trados Studio 2022 SR2 CU11 and 2024 CU1.

Until then, you can use this workaround.

1. Add a reference to Sdl.ProjectAutomation.FileBased to your project.
2. Add this reflection helper to your code. This helper includes a method to call a private static method in FileBasedProject assembly.
3. Call the helper method CallEnsurePluginRegistryIsCreated once, before the factory methods.
   
   Full code example here:
   

   using System;
   using System.Reflection;
   using Sdl.LanguagePlatform.TranslationMemoryApi;
   using Sdl.ProjectAutomation.FileBased;
   
   namespace ConsoleApp1
   {
       internal class Program
       {
           static void Main(string[] args)
           {
               Console.WriteLine("Calling TranslationProviderManager.GetTranslationProviderFactories...");
               ReflectionHelper.CallEnsurePluginRegistryIsCreated();
               var factories = TranslationProviderManager.GetTranslationProviderFactories();
               Console.WriteLine("Result obtained successfully: {0} objects.", factories.Count);
   
               Console.WriteLine("Press Enter to continue...");
               Console.ReadLine();
           }
       }
   
       public static class ReflectionHelper
       {
           public static void CallEnsurePluginRegistryIsCreated()
           {
               // Get the type of the class containing the private static method
               Type fileBasedProjectType = typeof(FileBasedProject);
   
               // Get the MethodInfo object for the private static method using BindingFlags
               MethodInfo methodInfo = fileBasedProjectType.GetMethod(
                   "EnsurePluginRegistryIsCreated",
                   BindingFlags.NonPublic | BindingFlags.Static);
   
               // Ensure the method has been found
               if (methodInfo == null)
               {
                   throw new InvalidOperationException("Could not find the method EnsurePluginRegistryIsCreated");
               }
   
               // Invoke the private static method
               methodInfo.Invoke(null, null);
           }
       }
   }

That's great! Thank you.
The workaround helps in our project! Thanks!