Addon has been unusable for some months in Classic Vanilla. Every time I mouse over an item Lua errors pop up.

First one:

Message: Interface/AddOns/VendorPricePlus/Compat.lua:52: attempt to call global 'GetMouseFocus' (a nil value)
Time: Sat Nov 23 19:47:52 2024
Count: 1
Stack: Interface/AddOns/VendorPricePlus/Compat.lua:52: attempt to call global 'GetMouseFocus' (a nil value)
[string "@Interface/AddOns/VendorPricePlus/Compat.lua"]:52: in function <Interface/AddOns/VendorPricePlus/Compat.lua:31>
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: in function SetBagItem' [string "@Interface/AddOns/Blizzard_UIPanels_Game/Classic/ContainerFrame_Shared.lua"]:1428: in function ContainerFrameItemButton_OnEnter'
[string "*ContainerFrame.xml:182_OnEnter"]:1: in function <[string "*ContainerFrame.xml:182_OnEnter"]:1>

Locals: tt = GameTooltip {
TopOverlay = Texture {
}
layoutType = "TooltipDefaultLayout"
shoppingTooltips =

{
}
NineSlice = Frame {
}
BottomOverlay = Texture {
}
needsReset = true
updateTooltip = 0.200000
}
(*temporary) = nil
(*temporary) = "attempt to call global 'GetMouseFocus' (a nil value)"
VP = {
}
Auctioneer = {
}

Second one:

Message: Interface/AddOns/VendorPricePlus/Compat.lua:52: attempt to call global 'GetMouseFocus' (a nil value)
Time: Sat Nov 23 19:47:52 2024
Count: 2
Stack: Interface/AddOns/VendorPricePlus/Compat.lua:52: attempt to call global 'GetMouseFocus' (a nil value)
[string "@Interface/AddOns/VendorPricePlus/Compat.lua"]:52: in function <Interface/AddOns/VendorPricePlus/Compat.lua:31>
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: ?
[string "=[C]"]: in function SetBagItem' [string "@Interface/AddOns/Blizzard_UIPanels_Game/Classic/ContainerFrame_Shared.lua"]:1428: in function UpdateTooltip'
[string "@Interface/AddOns/Blizzard_GameTooltip/Classic/GameTooltip.lua"]:452: in function <.../AddOns/Blizzard_GameTooltip/Classic/GameTooltip.lua:431>
[string "=[C]"]: ?

Locals: tt = GameTooltip {
TopOverlay = Texture {
}
layoutType = "TooltipDefaultLayout"
shoppingTooltips =

{
}
NineSlice = Frame {
}
BottomOverlay = Texture {
}
needsReset = true
updateTooltip = 0.200000
}
(*temporary) = nil
(*temporary) = "attempt to call global 'GetMouseFocus' (a nil value)"
VP = {
}
Auctioneer = {
}