Realm Unjoinable after Nether Reactor Crash!

Realm name: WorstRealm2

Registered to: unerds_

Issue: A bunch of players attempted to activate the Nether Reactor - apparently, all their clients crashed (maybe one didn't) - now, nobody can join it.

I attempted this morning - no go... I then proceeded to attempt to join a different realm with no issue.

so it seems like something is wrong with that specific realm.