Message: Interface\AddOns\TellMeWhen\TellMeWhen.lua:41: Cannot find a library instance of "LibOO-1.0".
Time: 10/19/19 18:13:10
Count: 1
Stack: [C]: in function `error'
Interface\AddOns\Ace3\LibStub\LibStub.lua:23: in function `LibStub'
Interface\AddOns\TellMeWhen\TellMeWhen.lua:41: in main chunk

Locals: (*temporary) = "Cannot find a library instance of "LibOO-1.0"."