@ColdSkull1:
Sorry, but you've started a new game after the error. The output_log.txt file will be newly created at every game start. I can only take a look into it, if you send me a file from shortly after the error without a restart of RimWorld. Just exit the game and make a copy of the output_log.txt file. Only then will the error still be in there. Sorry.
@Canute:
The first critical issue you have is this part:
NullReferenceException: Object reference not set to an instance of an object
at Verse.ThingIDMaker.GiveIDTo (Verse.Thing t) [0x00000] in <filename unknown>:0
at Verse.Thing.PostMake () [0x00000] in <filename unknown>:0
at Verse.ThingWithComps.PostMake () [0x00000] in <filename unknown>:0
at Verse.ThingMaker.MakeThing (Verse.ThingDef def, Verse.ThingDef stuff) [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.CostCalculator.GetBaseThingCost (Verse.ThingDef def, Verse.ThingDef stuffDef) [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.EquipmentDatabase.CreateEquipmentEntry (Verse.ThingDef def, Verse.ThingDef stuffDef, Int32 type) [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.EquipmentDatabase.AddThingDef (Verse.ThingDef def, Int32 type) [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.EquipmentDatabase.BuildEquipmentLists () [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.EquipmentDatabase..ctor () [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.PrepareCarefully..ctor () [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.PrepareCarefully.get_Instance () [0x00000] in <filename unknown>:0
at EdB.PrepareCarefully.ModController.OnLevelWasLoaded (Int32 level) [0x00000] in <filename unknown>:0
The part with the Trader:
Could not resolve reference to object with loadID TradingPost58874 of type Trader.Building_TradingPost. Was it compressed away, destroyed, had no ID number, or not saved/loaded right?
is rather harmless. It's a loading error of the tent building. But nothing serious. It could result in an error when you interact with it. Or it could do nothing dangerous at all.
More interesting is this line:
Tried to get pawn head at path Things/Pawn/Humanoid/Heads/Male/Male_Narrow_Normal with color RGBA(1.000, 0.937, 0.835, 1.000) that was not found. Defaulting...
This shows that RimWorld couldn't load the head graphics of your pawns. But this is extremely unusual, as they are part of the vanilla resources. My guess is, that it has something to do with the error from EdBs Prepare Carefully.. But as that looks like a problem calculating something, I'm not too sure. But it definitely has nothing to do with the Traders, as there is nothing in ther, that changes anything of a pawn..
The head graphic missing happened for all your people. And this might be the problem you couldn't load because this might be the result:
Exception drawing Jogger: System.NullReferenceException: Object reference not set to an instance of an object
at RimWorld.PawnUtility.GetPosture (Verse.Pawn p) [0x00000] in <filename unknown>:0
at Verse.PawnRenderer.RenderPawnAt (Vector3 drawLoc, BodyDrawType bodyDrawType) [0x00000] in <filename unknown>:0
Sorry, but I couldn't find anything that could be caused by Miscellaneous.
The trader tent id, I don't know, but it looks more like something was misconfigured at savetime. It may have been a problem from the early alpha 10 versions... I'm just not sure.