Weird error since latest patch

[MeanMae]

I have no idea which addon is causing this or how to fix it. Here's the error I'm getting whenever I open a book.

EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:1500: attempt to index a nil value
stack traceback:
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:1500: in function 'CenterScreenAnnounce:CallExpiringCallback'
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:618: in function 'ZO_CenterScreenAnnouncementLargeLine.ExpiringCallback'
[C]: in function 'PlayFromStart'
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:632: in function 'ZO_CenterScreenAnnouncementLargeLine:PlayWipeAnimation'
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:1417: in function 'setupFunction'
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:1621: in function 'CenterScreenAnnounce:DisplayMessage'
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:1325: in function 'CenterScreenAnnounce:TryDisplayingNextQueuedMessage'
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:898: in function 'OnCenterScreenAnnounceUpdate'

HALP! I think it MIGHT have something to do with Librarian, but not 100% sure cuz it isn't mentioning that.