Players in server not seeing each other

When the players join the server immediately it tells them that all the other players have timed out and they can’t see each other anymore. And it says that for every player that joins or is in game even though they are all actually in game. Does anyone know why this would be?

Do they have a red square?

When they have a red square it usually goes away. How would they get rid of the red square?

Actually wait they just told me that they all had red squares every time they tried to join. But if they went onto another server the red square went green. So I assume it’s a problem with the server then?

Yes  

Have everyone restart their game & restart the server. Seems to work for my friend and I after that’s done.

@Boss would it be a problem with the port forwarding? Or something else

@Ben-Sylingo OK Will try that