225 can load the map, but if you join the game/server its running on
( even if you join with 227h) , the client crashes with a Gpf:
History: UGameEngine::LoadMap <- AttemptLoadPending <- TickPending <- UGameEngine::Tick <- UpdateWorld <- MainLoop
so somthing still needs to be fixed
I remember having to fix some issues for this map when putting it on Loathsomes ecoop servers (UT). One of the problems was that for some reason, the author has set bLonePlayer=True in the level properties. This causes each connecting player to play the map StandAlone instead. Dunno if that's related to your crash, that GPF message is rather vague. Perhaps post the relevant part of your log file.