Not sure anything else is broken but here is error I am seeing....

CookyItemSplitter\src\main\core.lua:156: 'for' limit must be a number
[string "@CookyItemSplitter\src\main\core.lua"]:156: in function <CookyItemSplitter\src\main\core.lua:152>
[string "@CookyItemSplitter\src\main\core.lua"]:413: in function <CookyItemSplitter\src\main\core.lua:388>
[string "@CookyItemSplitter\src\main\core.lua"]:588: in function <CookyItemSplitter\src\main\core.lua:587>

Adding the line below to the WoW Functions section of the core.lua file seems to have fixed it for me if you want to verify or update it

local MAX_GUILDBANK_SLOTS_PER_TAB = 98