My friends cant join my worlds no matter what we do when we have any addons. when they are downloading the world/addons to join, they keep getting lost connection or crash.

Whenever my friends try to join me when I have addons, they are not able to load and will “lose connection” or just crashes the whole game. No matter what we do it still crashes, for example I would restart the game, even delete and reinstall the game, but still won't allow friends play the world. It's been like this for a while now. Please fix this.