Well, I loaded your save in both the unmodded game and in one having Naughty Tribute Mod installed. Both times without problem (except the message popping up saying that an older version save has been migrated). I then skipped to late night (not evening but late night), went to the graveyard, and voilà: Halloween scene triggers.
I don't know what goes wrong with your installation. I attach two saves here, both converted with Naughty Tribute Mod's feature of advanced save compatibility. That should not be necessary as I said they also work out of the box for me, but whatever. One save is at late night in the main city map. Going to the graveyard will trigger the scene for me, as I wrote. The other is after the scene triggerd, before you enter the tomb. Loading that and you should just have to click the cave entrance to continue. But you'll miss the creepy intro scene :-/