So the error appears to be in Rackiefamily.qsd which doesn't surprise me at all since it is an empty file so it cannot open properly.
Check for yourself in 3ddata\QUESTDATA\NPC folder of your server
If the file has a size of 0kb then it is empty and won't load.
OK this is interesting. Up till now my copy of rev 4 has been working just fine and getting past that error without crashing.
However I couldn't see where it attempted to load RACKIEFAMILY.QSD because it was scrolled off top of the console.
So I went to check my server logs and found there is no LOG folder in my server so nothing was being saved to a log.
I added a "log" folder to my binary folder and ran it again.
This time it crashed at the same place it did for you.
So it looks like the error might be coming from the log process rather than the server itself.
Either way, the root cause is that we are trying to load a zero size file so that RACKIEFAMILY.QSD file needs to be gotten rid of. best thing to do is rename it just in case you want to modify it and bring it back in later
Call it RACKIEFAMILY.old or something
Also go through that QUESTDATA\NPC folder and do the same for any other file that has a size of 0kb
Alternatively you could open up LIST_QUESTDATA.STB and delete the entries for all the zero size family QSD files so it won't even try to load them. There are a few of them
AquaFamily.qsd
BeetleFamily.qsd
RackieFamily.qsd
TurtleFamily.qsd
Those are the ones that I can find anyway.
As long as we stop the server trying to load these files it will be fine.