What steps will reproduce the problem?

Message: ...terface\AddOns\ShestakUI\Modules\Chat\ChatFrames.lua:392: attempt to call global 'IsPartyLFG' (a nil value)
Time: Sun Jul 4 23:04:34 2021
Count: 5
Stack: ...terface\AddOns\ShestakUI\Modules\Chat\ChatFrames.lua:392: attempt to call global 'IsPartyLFG' (a nil value)
[string "@interface\AddOns\ShestakUI\Modules\Chat\ChatFrames.lua"]:392: in function use' [string "@Interface\AddOns\ShestakUI\Modules\Chat\ChatFrames.lua"]:405: in function <...terface\AddOns\ShestakUI\Modules\Chat\ChatFrames.lua:397> [string "=[C]"]: ? [string "=[C]"]: in function securecall'
[string "@interface\FrameXML\ChatFrame.lua"]:4620: in function `ChatEdit_OnTabPressed'
[string ":OnTabPressed"]:1: in function <[string ":OnTabPressed"]:1>

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

Do you have an error log of what happened?

when i type tab,then it happened

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

This should now be resolved with 502ca98. It will be in for the next release.