4x Interface/AddOns/tdBattlePetScript/UI/MainPanel.lua:366: attempt to index field 'ScriptBox' (a nil value)
[string "@Interface/AddOns/tdBattlePetScript/UI/MainPanel.lua"]:366: in function OnFontChanged' [string "@Interface/AddOns/tdBattlePetScript/UI/MainPanel.lua"]:352: in function <Interface/AddOns/tdBattlePetScript/UI/MainPanel.lua:351> [string "=[C]"]: ? [string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:66: in function <...vUI/Libraries/Core/Ace/AceAddon-3.0/AceAddon-3.0.lua:61> [string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:523: in function EnableAddon'
[string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:536: in function EnableAddon' [string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:626: in function <...vUI/Libraries/Core/Ace/AceAddon-3.0/AceAddon-3.0.lua:611> [string "=[C]"]: in function LoadAddOn'
[string "@Interface/FrameXML/UIParent.lua"]:530: in function UIParentLoadAddOn' [string "@Interface/AddOns/Rarity/Core/Collections.lua"]:63: in function ScanToys'
[string "@Interface/AddOns/Rarity/Core/Collections.lua"]:282: in function ScanExistingItems' [string "@Interface/AddOns/Rarity/Core.lua"]:175: in function DoEnable'
[string "@Interface/AddOns/Rarity/Core.lua"]:151: in function <Interface/AddOns/Rarity/Core.lua:150>
[string "=[C]"]: ?
[string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:66: in function <...vUI/Libraries/Core/Ace/AceAddon-3.0/AceAddon-3.0.lua:61>
[string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:523: in function `EnableAddon'
[string "@Interface/AddOns/ElvUI/Libraries/Core/Ace/AceAddon-3.0-13/AceAddon-3.0.lua"]:626: in function <...vUI/Libraries/Core/Ace/AceAddon-3.0/AceAddon-3.0.lua:611>

I have a fix for this coming

around 366 edit this line to add the ', ""'
self.ScriptBox:SetFont(Addon:GetSetting('editorFontFace'), Addon:GetSetting('editorFontSize'), "")

Also 3 places have:
...SetMinResize(a,b) and
...SetMaxResize(c,d)
they need to be changed to ...SetResizeBounds(a,b,c,d)

around 366 edit this line to add the ', ""' self.ScriptBox:SetFont(Addon:GetSetting('editorFontFace'), Addon:GetSetting('editorFontSize'), "")

Also 3 places have: ...SetMinResize(a,b) and ...SetMaxResize(c,d) they need to be changed to ...SetResizeBounds(a,b,c,d)

I have a working build already, just beta testing. Should be uploaded to curse soon

Fixed and uploaded to Curse :)