modmain.lua attempt to index field "inst" (a nil value)

[DSTMCreator]

(Sorry for my bad english again...)

Hello everyone. Lua error message confused me and as result file with error wasn't even mentioned in error message.

But I found this file and fix it. Now I got another error.

Please help.

../mods/newdust/modmain.lua:117 attempt to index field "inst" (a nil value)
LUA ERROR stack traceback:
	../mods/newdust/modmain.lua:117 in (method) Visit (Lua) <114-120>

And here is the code from modmain.lua:

AddBrainPostInit("abigailbrain", function(self)
	local _atfn = self.inst.components.aura.auratestfn
	self.inst.components.aura.auratestfn = function(inst, target)
		if inst.cowardmode then
			return false
		end
		return _atfn(inst, target)
	end
	local _caav = self.bt.root.children[1].Visit
	self.bt.root.children[1].Visit = function(self)
		_caav(self)
		if self.status == GLOBAL.RUNNING then
			local leader = self.inst.components.follower.leader
			if leader and not self.inst:IsNear(leader, 15) then
				self.inst.cowardmode = true
				self.status = GLOBAL.FAILED
				self.inst.components.combat:GiveUp()
				self.inst.components.locomotor:Stop()
				return
			else
				self.inst.cowardmode = nil
			end
		end
	end
	local _offn = self.bt.root.children[2].Visit
	self.bt.root.children[2].Visit = function(self)
		_offn(self)
		if self.status == GLOBAL.SUCCESS then
			self.inst.cowardmode = nil -- HERE
			return
		end
	end
end)

Like in previous time I guess error is not in this file. But I dont know where exactly.

It says self.inst is nil.