Can't party join Xbox on PC?

There's always an error message when it says that my network settings block the party…

I still have not solved it after a month.

In the router, if necessary, open the ports.

https://support.xbox.com/...-xbox-live

How do I open ports?

This varies from router to router. https://portforward.com/router.htm

You can also download the Xbox app to your mobile phone. Since the party always works with me. At least that's how I do it