What steps will reproduce the problem?

1. An error occurs at level 60.

What version of ShestakUI are you using? (Stating 'latest' is not useful)

ShestakUI_Classic 0.88

Do you have an error log of what happened?

Message: ...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:25: attempt to call global 'IsWatchingHonorAsXP' (a nil value)
Time: Mon Sep 16 20:11:49 2019
Count: 1
Stack: ...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:25: attempt to call global 'IsWatchingHonorAsXP' (a nil value)
...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:25: in function <...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:23>
...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:57: in function <...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:56>
...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:147: in function <...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:141>
(tail call): ?
...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:191: in function <...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:175>
...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:228: in function <...ace\AddOns\ShestakUI\Libs\oUF\Modules\Experience.lua:209>
(tail call): ?
Interface\AddOns\ShestakUI\Libs\oUF\oUF.lua:212: in function <Interface\AddOns\ShestakUI\Libs\oUF\oUF.lua:194>
(tail call): ?

Locals: (*temporary) = nil
(*temporary) = "attempt to call global 'IsWatchingHonorAsXP' (a nil value)"

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)