Grail still appears to have some issues. This popped up while I was entering Ashenvale from Mor'shan Ramparts. No idea why

Message: Interface\AddOns\Grail\Grail.lua:8791: Usage: GetGarrisonInfo(garrisonType)
Time: Thu Oct 15 11:04:12 2020
Count: 1
Stack: Interface\AddOns\Grail\Grail.lua:8791: Usage: GetGarrisonInfo(garrisonType)
[string "=[C]"]: ?
[string "=[C]"]: in function GetGarrisonInfo' [string "@Interface\AddOns\Grail\Grail.lua"]:8791: in function _PhaseMatches'
[string "@interface\AddOns\Grail\Grail.lua"]:6426: in function f' [string "@Interface\AddOns\Grail\Grail.lua"]:3728: in function _AllEvaluateTrueS'
[string "@interface\AddOns\Grail\Grail.lua"]:3828: in function <Interface\AddOns\Grail\Grail.lua:3809>
[string "=(tail call)"]: ?
[string "=(tail call)"]: ?
[string "@interface\AddOns\Grail\Grail.lua"]:8111: in function MeetsPrerequisites' [string "@Interface\AddOns\Grail\Grail.lua"]:10784: in function StatusCode'
[string "@interface\AddOns\Grail\Grail.lua"]:6603: in function f' [string "@Interface\AddOns\Grail\Grail.lua"]:3728: in function _AllEvaluateTrueS'
...
[string "=(tail call)"]: ?
[string "@interface\AddOns\Grail\Grail.lua"]:3745: in function AncestorStatusCode' [string "@Interface\AddOns\Grail\Grail.lua"]:10786: in function StatusCode'
[string "@interface\AddOns\Grail\Grail.lua"]:4283: in function ClassificationOfQuestCode' [string "@Interface\AddOns\Wholly\Wholly.lua"]:1434: in function _ClassifyQuestsInMap'
[string "@interface\AddOns\Wholly\Wholly.lua"]:1885: in function _ForcePanelMapArea' [string "@Interface\AddOns\Wholly\Wholly.lua"]:4417: in function UpdateQuestCaches'
[string "@interface\AddOns\Wholly\Wholly.lua"]:963: in function ?' [string "@Interface\AddOns\Wholly\Wholly.lua"]:2532: in function _OnEvent'
[string "@interface\AddOns\Wholly\Wholly.lua"]:4433: in function <Interface\AddOns\Wholly\Wholly.lua:4433>

Locals:

Line ~8790 In Grail.lua needs to be
currentPhase = C_Garrison.GetGarrisonInfo(Enum.GarrisonType.Type_6_0) or 0 -- the API returns nil when there is no garrison
some things changed to enums in the SL Patch.
Might still be missing in the curren release

I just pushed an update to GitHub that redefines the old enum in an attempt to get this to work properly.

Grail 112 is now released with this change.