500 Internal Error When GetAllMappingsAsync

Hello there!
I recently created a simple UPNP Port Mapper for managing port mappings and I choose this library to help.
It worked amazingly until I was getting close to putting it on the Microsoft Store.
All of the sudden I was getting a 500 Internal Error whenever I ran GetAllMappingsAsync, but after disabling break on exceptions, the program worked just fine until I reenabled it. So I can only run my program in Visual Studio and can't release it.

Does any one have an idea? Thank you if you do.

IDE: Visual Studio 2022
Libraries: MAUI, Open.Nat

Let me know if you need more info.