LUA Error when using Garrison Buddy

Hi Team

Since today I get following error when I use Garrison Buddy. I happens always shortly before the bot is done (last call of missions)

Code:

ID: 1
Error occured in: Global
Count: 1
Message: [string "WoW.lua"] line 3:
   attempt to call global 'GarrisonMissionPage_UpdateMissionForParty' (a nil value)
Debug:
   [string "WoW.lua"]:3: in main chunk
Locals:
(*temporary) = nil
(*temporary) = "attempt to call global 'GarrisonMissionPage_UpdateMissionForParty' (a nil value)"

AddOns:
  Swatter, v5.21f.5579 (SanctimoniousSwamprat)