The following error happens when looking in garrison missions, mine happens to be level 3, I'd be looking at missions panel and either want to see a follower closer or misclick too close to follower instead of mission and get sent to follower page, when I try to select the tab to go back to missions the following error happens and can no longer access the mission page unless a ui reload happens or log off and log back in:

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60x Ace3\AceHook-3.0\AceHook-3.0-8.lua:180: Attempting to rehook already active hook SetMission.
[C]: ?
Ace3\AceHook-3.0\AceHook-3.0-8.lua:180: in function <Ace3\AceHook-3.0\AceHook-3.0.lua:118>
Ace3\AceHook-3.0\AceHook-3.0-8.lua:341: in function SecureHook' Skinner\AddonSkins\Ace3.lua:355: in function <Skinner\AddonSkins\Ace3.lua:22> Skinner\AddonSkins\Ace3.lua:444: in function <Skinner\AddonSkins\Ace3.lua:442> (tail call): ? ...rfaceGarrisonCommander\GarrisonCommander-3.0.2 70200.lua:1515: in function <...rfaceGarrisonCommander\GarrisonCommander.lua:1430> (tail call): ? ...rfaceGarrisonCommander\GarrisonCommander-3.0.2 70200.lua:1347: in function <...rfaceGarrisonCommander\GarrisonCommander.lua:1341> (tail call): ? [C]: in function GarrisonFollowerListButton_OnClick'
[string ":OnClick"]:4: in function <[string ":OnClick"]:1>

Locals:
(*temporary) = "Attempting to rehook already active hook SetMission."

The number of errors might be high because I tried to click the missions tab a few times and the error kept happening.

Thanks

After doing some troubleshooting, it seems the error is actually in the Skinner addon, will mark the issue closed and report the problem to the Skinner author.