Can't connect with a world

Hi,

When I try to connect in my minecraft windows 10 version with a friend that is playing in minecraft bedrock ps4, the game say me that it can't connects with his world, so how can I solve it?

We have the crossplay activated in the minecraft and in our xbox live account, and my friend and me are friends in xbox live.
Also we have the same minecraft version, so how can I fix it?
Thanks.