Cannot join friend, I get stuck on Locating Server screen.

(The world was made in 1.16.100, I have tried to join in the newest version also). Every time I try to join my friend Bdrain's (Username) world I get stuck on the message, Locating Server. I have tried re-installing Minecraft, blocking and unblocking him, joining a copy, and join other worlds. It seems that I can't join him, I can join everyone else except for him. His xbox Gamertag is Bdrain#5897.