Can't enter our realms..

Hi.
I can't enter specific realm and every player in our realm does too..
(Some of them can enter but soon they get error message and shut off)
owner of this realm is "widesea99".

I've tried other random realms and turns out that it worked just fine.
I have both PE version and Win10 version... which both can't enter the realm.
we've build many things in our realm and spent a lot of time in it ..... so please help us figure out.
Thanks.