After going through my addons, seems bigdebuffs is the only one causing this error.
Suddenly started out of the blue without me installing any new addons.

PS: Did try to reinstall using curseforge

Message: ADDON_ACTION_BLOCKED: ElvUI tried to call the protected function 'ArenaEnemyFrames:ClearAllPoints()'.
Time: Sat Feb 6 05:24:39 2021
Count: 5
Stack: ADDON_ACTION_BLOCKED: ElvUI tried to call the protected function 'ArenaEnemyFrames:ClearAllPoints()'.
[string "@interface\AddOns\ElvUI\Libraries\Ace3\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:29: in function <...ies\Ace3\CallbackHandler-1.0\CallbackHandler-1.0.lua:25>
[string "@interface\AddOns\ElvUI\Libraries\Ace3\CallbackHandler-1.0\CallbackHandler-1.0.lua"]:64: in function Fire' [string "@Interface\AddOns\ElvUI\Libraries\Ace3\AceEvent-3.0\AceEvent-3.0.lua"]:120: in function <...s\ElvUI\Libraries\Ace3\AceEvent-3.0\AceEvent-3.0.lua:119> [string "=[C]"]: in function ClearAllPoints'
[string "@interface\FrameXML\UIParent.lua"]:3384: in function UIParentManageFramePositions' [string "@Interface\FrameXML\UIParent.lua"]:2632: in function <Interface\FrameXML\UIParent.lua:2619> [string "=[C]"]: in function SetAttribute'
[string "@interface\FrameXML\UIParent.lua"]:3422: in function <Interface\FrameXML\UIParent.lua:3420>
[string "=[C]"]: in function UIParent_ManageFramePositions' [string "@Interface\FrameXML\ExtraAbilityContainer.lua"]:76: in function OnCleaned'
[string "@interface\SharedXML\LayoutFrame.lua"]:107: in function MarkClean' [string "@Interface\SharedXML\LayoutFrame.lua"]:168: in function Layout'
[string "@interface\SharedXML\LayoutFrame.lua"]:86: in function <Interface\SharedXML\LayoutFrame.lua:84>

Locals: