Cant join friends

[CloverLeafPetal]

I cant join anyone in game through invite or lobby code, and they can't join me either, how do i fix this?

[flutterbrony]

You can try adding -steamMM in the launch option of the game.
It happens to me and a lot of my friends too since an update where they use epic games servers instead of steam, and since, we can't play from steam except if we add that option

[CloverLeafPetal]

I already had that added as my game wouldn't open without it, so I'm not sure