Noobish problem : "function expected instead of nil" when using saved variables

[Fetaro]

Hi,

I'm aware that this is a noobish question. But I can't find any solution anywhere. I followed some guides, I've googled, I've read another addons source code. Whatever I try, I have this error : "LegerdemainLog.lua:17: function expected instead of nil".

So, I have this .txt

## APIVersion: 100018
## Title: LegerdemainLog |c886600 v1.0.0 |r
## Description: |ca0a0a0LegerdemainLog.|r
## Author: |cFF2222Fetaro|r
## SavedVariables: LegerdemainLogSavedDatas

LegerdemainLog.lua

And then, I have this LUA

LegerdemainLog = {}
LegerdemainLog.name = "LegerdemainLog"

local defaults = {}
 
function LegerdemainLog:Initialize()
	EVENT_MANAGER:RegisterForEvent(self.name, EVENT_INVENTORY_SINGLE_SLOT_UPDATE , self.OnInventorySlotUpdate)
	self.savedDatas = ZO_SavedVars:New("LegerdemainLogSavedDatas", 1, nil, defaults)
end

function LegerdemainLog.OnInventorySlotUpdate(eventCode, bagId, slotId, isNewItem, soundCategory, inventoryUpdateReason, quantity)
  --whatever
end
 
function LegerdemainLog.OnAddOnLoaded(event, addonName)
	if addonName == LegerdemainLog.name then
		LegerdemainLog:Initialize() -- This is line 17
	end
end

EVENT_MANAGER:RegisterForEvent(LegerdemainLog.name, EVENT_ADD_ON_LOADED, LegerdemainLog.OnAddOnLoaded)

The problem doesn't happen when I don't try to used saved variables.

What the hell am I doing wrong ? Please? :3