WowAce

Upon Login I am getting the following LUA errors:

Message: Interface\AddOns\VisualHeal\VisualHeal-11.12.lua:644: Attempt to register unknown event "PARTY_MEMBERS_CHANGED"
Time: Tue Jul 24 15:21:53 2018
Count: 1
Stack: Interface\AddOns\VisualHeal\VisualHeal-11.12.lua:644: Attempt to register unknown event "PARTY_MEMBERS_CHANGED"

Locals: <none>

*************************************************

Message: Interface\AddOns\VisualHeal\VisualHeal-11.12.lua:644: Attempt to register unknown event "PARTY_MEMBERS_CHANGED"
Time: Tue Jul 24 15:35:02 2018
Count: 1
Stack: Interface\AddOns\VisualHeal\VisualHeal-11.12.lua:644: Attempt to register unknown event "PARTY_MEMBERS_CHANGED"
[C]: ?
[string "safecall Dispatcher[1]"]:9: in function <[string "safecall Dispatcher[1]"]:5>
(tail call): ?
Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:558: in function `EnableAddon'
Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:651: in function <Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:636>
[C]: in function `LoadAddOn'
Interface\FrameXML\UIParent.lua:445: in function `UIParentLoadAddOn'
Interface\FrameXML\UIParent.lua:488: in function `CombatLog_LoadUI'
Interface\FrameXML\UIParent.lua:1193: in function <Interface\FrameXML\UIParent.lua:1089>

Locals: <none>