I keep getting this error ingame

[AFlyingMoa]

EsoUI/Libraries/Utility/ZO_FadingControlBuffer.lua:259: function expected instead of nil
stack traceback:
EsoUI/Libraries/Utility/ZO_FadingControlBuffer.lua:259: in function 'ZO_FadingControlBuffer:DisplayMessage'
EsoUI/Libraries/Utility/ZO_FadingControlBuffer.lua:65: in function 'ZO_FadingControlBuffer:AddMessage'
EsoUI/Ingame/AlertText/AlertText.lua:25: in function 'InternalPerformAlert'
EsoUI/Ingame/AlertText/AlertText.lua:34: in function 'ZO_Alert'
EsoUI/Ingame/AlertText/AlertText.lua:64: in function 'OnAlertEvent'|r

I usually get this error about twice every time I load into the world and I have no idea what is causing it.