LAN party does not work in 1.19

Put the summary of the bug you're having here

well, i want to play with some friends in our private world in 1.19 (the new version) but we can't anymore even when we are next to each other with the same wifi. 

What I expected to happen was...:
Describe what you thought should happen here

I hope you can give me anwers or a sollution so i can play in the new version with my friends.

What actually happened was...:
Describe what happened here

nothing

 

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here

I get in the world and turn LAN on 
2. ... 

none of my friends can see the game
3. ...

we stop and are sad