All unit frames are greyed and unusable. one of the error messages after clicking minimap button:

Message: [string "*ZPerl.xml:74_OnClick"]:2: attempt to call global 'XPerl_MinimapButton_OnClick' (a nil value)
Time: Tue Aug 13 18:08:49 2024
Count: 1
Stack: [string "*ZPerl.xml:74_OnClick"]:2: attempt to call global 'XPerl_MinimapButton_OnClick' (a nil value)
[string "=[C]"]: in function XPerl_MinimapButton_OnClick' [string "*ZPerl.xml:74_OnClick"]:2: in function <[string "*ZPerl.xml:74_OnClick"]:1> [string "=[C]"]: in function Click'
[string "@Interface/AddOns/Leatrix_Plus/Leatrix_Plus.lua"]:5911: in function `OnClick'
[string "@Interface/AddOns/Decursive/Libs/LibDBIcon-1.0/LibDBIcon-1.0.lua"]:179: in function <...ddOns/Decursive/Libs/LibDBIcon-1.0/LibDBIcon-1.0.lua:177>

Have the same issue, I have different errors:
5x [string "*ZPerl_Target.xml:38_OnLoad"]:6: attempt to call global 'ZPerl_Unit_OnEnter' (a nil value)
[string "*ZPerl_Target.xml:38_OnLoad"]:6: in function <[string "*ZPerl_Target.xml:38_OnLoad"]:5>

Locals:
self = XPerl_FocusnameFrame {
Center = Texture { }
RightEdge = Texture { }
backdropInfo = { }
BottomEdge = Texture { }
BottomLeftCorner = Texture { }
BottomRightCorner = Texture { }
TopEdge = Texture { }
TopRightCorner = Texture { }
TopLeftCorner = Texture { }
LeftEdge = Texture { }
}
(*temporary) = nil
(*temporary) = XPerl_Focus { }
(*temporary) = "attempt to call global 'ZPerl_Unit_OnEnter' (a nil value)"

5x [string "*ZPerl_Target.xml:38_OnLoad"]:9: attempt to call global 'ZPerl_Unit_OnLeave' (a nil value)
[string "*ZPerl_Target.xml:38_OnLoad"]:9: in function <[string "*ZPerl_Target.xml:38_OnLoad"]:8>

Locals:
self = XPerl_FocusnameFrame {
Center = Texture { }
RightEdge = Texture { }
backdropInfo =

{ }
BottomEdge = Texture { }
BottomLeftCorner = Texture { }
BottomRightCorner = Texture { }
TopEdge = Texture { }
TopRightCorner = Texture { }
TopLeftCorner = Texture { }
LeftEdge = Texture { }
}
(*temporary) = nil
(*temporary) = XPerl_Focus {
}
(*temporary) = "attempt to call global 'ZPerl_Unit_OnLeave' (a nil value)"

Can confirm, all unit frames are completely grey without any content, since WoW build 11.0.2.56110

Same. Unable to even get options to open, frames greyed out and a lot of everchanging error msgs.