WowAce

in wow classic:som this addon generates the following error (and 5 more pages of errors if you dont manually download ace3):

Message: Interface\AddOns\beql\questtracker.lua:161: attempt to call method 'SetBackdropBorderColor' (a nil value)
Time: Thu Nov 25 04:58:23 2021
Count: 1
Stack: Interface\AddOns\beql\questtracker.lua:161: attempt to call method 'SetBackdropBorderColor' (a nil value)
[string "@Interface\AddOns\beql\questtracker.lua"]:161: in function `applyStyles'
[string "@Interface\AddOns\beql\questtracker.lua"]:77: in function <Interface\AddOns\beql\questtracker.lua:60>
[string "=[C]"]: ?
[string "@Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua"]:70: in function <Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:65>
[string "@Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua"]:527: in function `EnableAddon'
[string "@Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua"]:540: in function `EnableAddon'
[string "@Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua"]:630: in function <Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:615>

Locals: <none>