I sometimes get this error after a loading screen. In this case I got it after a round in dreamland, but I have had it on alts doing their daily quests + mini's run. Happens only after a loading screen, so I guess it could be some issue in the player:update() or such.
Checking for missed Loot... completed.
Deleting: Ruins Heavy Crossbow
Inventory cleaned out
Waiting for next area to appear
Player address changed: 0x263B9100
The game client did not crash.
11:39am - undefined player.Class1 in settings.lua
high ping or slow PC?
My guess is it leaves the loadingscreen and then tries to update a little to soon afterwards.
Although it does show the new address so not sure, maybe increase the rest in waitforloadingscreen and test it out.
Fast comp, standard ping for somebody from Australia on Nexon or US (250-400). I changed the rest(2000) to rest(4000) months ago, which stopped it from thinking the character was dead after a loadingscreen, but do sometimes get this error.
I had 4 chars farming KS (nexon) non stop for around 4 days and never got this issue, 2 were doing the ksfrogs which does a lot of loadingscreens. An ok PC and just enough connection speed, so yeah not sure what it could be then.
Remember no matter you do in life to always have a little fun while you are at it