WowAce

2x [ADDON_ACTION_FORBIDDEN] AddOn 'Ace3' tried to call the protected function 'OnOpen()'.
[string "@!BugGrabber/BugGrabber.lua"]:480: in function <!BugGrabber/BugGrabber.lua:480>
[string "=[C]"]: in function `OnOpen'
[string "@Blizzard_EncounterJournal/Blizzard_EncounterJournal.lua"]:587: in function <...zzard_EncounterJournal/Blizzard_EncounterJournal.lua:576>
[string "=[C]"]: ?
[string "=[C]"]: in function `Show'
[string "@FrameXML/UIParent.lua"]:2943: in function `SetUIPanel'
[string "@FrameXML/UIParent.lua"]:2786: in function `ShowUIPanel'
[string "@FrameXML/UIParent.lua"]:2651: in function <FrameXML/UIParent.lua:2647>
[string "=[C]"]: in function `SetAttribute'
[string "@FrameXML/UIParent.lua"]:3253: in function `ShowUIPanel'
[string "@FrameXML/UIParent.lua"]:3214: in function `ToggleFrame'
[string "@FrameXML/UIParent.lua"]:1150: in function `ToggleEncounterJournal'
[string "@LUI/modules/micromenu/micromenu.lua"]:164: in function <LUI/modules/micromenu/micromenu.lua:163>

Locals:
_ = Frame {
RegisterEvent = <function> defined @!BugGrabber/BugGrabber.lua:486
0 = <userdata>
UnregisterEvent = <function> defined @!BugGrabber/BugGrabber.lua:486
SetScript = <function> defined @!BugGrabber/BugGrabber.lua:486
}
event = "ADDON_ACTION_FORBIDDEN"
events = <table> {
ADDON_ACTION_BLOCKED = <function> defined @!BugGrabber/BugGrabber.lua:552
ADDON_ACTION_FORBIDDEN = <function> defined @!BugGrabber/BugGrabber.lua:552
PLAYER_LOGIN = <function> defined @!BugGrabber/BugGrabber.lua:546
LUA_WARNING = <function> defined @!BugGrabber/BugGrabber.lua:561
ADDON_LOADED = <function> defined @!BugGrabber/BugGrabber.lua:506

Taing/Blocked issues are usually caused by an addon using Ace3, not Ace3 itself. In this case maybe LUI? Hard to say with these kind of issues without the addon in question.