Hmm... there is a ULib function being called 2 minutes after the server starts, try this:
Try commenting out line 128 in download.lua, this line should read:
AddTimer( 120, 1, cleanRes, true )
Change it to:
--AddTimer( 120, 1, cleanRes, true )
Please let us know if this fixes your problem or not, so we can deal with this if it's causing crashes.