What steps will reproduce the problem?

hello,1.5.8 appears one bug again..... as follows：
...estakUI\Modules\Skins\Blizzard_Vanilla\Character.lua:207: attempt to index global 'PetPaperDollFrameCompanionFrame' (a nil value)
Count: 1

Call Stack:
[string "=[C]"]: ?
[string "@AddOns\ShestakUI\Modules\Skins\Blizzard_Vanilla\Character.lua"]:207: in function `skinfunc'
[string "@AddOns\ShestakUI\Core\API.lua"]:939: in function <AddOns\ShestakUI\Core\API.lua:922>

Normal operation. Thanks.

Apologies once more. Again a result of adding Wrath Classic support and not thoroughly testing in Classic / TBC Classic. Will resolve this issue shortly.

Fixed in 1.5.9. Incoming.