icon selection panel throws error when scrolling

[ScottIngram]

after I click the "change name / icon" button and the icon picker appears, if try to scroll, this happens:

Message: Interface/SharedXML/SecureUIPanelTemplates.lua:330: attempt to perform arithmetic on local 'itemHeight' (a nil value)
Time: Sun Mar 19 13:45:25 2023
Count: 1
Stack: Interface/SharedXML/SecureUIPanelTemplates.lua:330: attempt to perform arithmetic on local 'itemHeight' (a nil value)
[string "@Interface/SharedXML/SecureUIPanelTemplates.lua"]:330: in function FauxScrollFrame_OnVerticalScroll' [string "*FloFlyout.xml:465_OnVerticalScroll"]:1: in function <[string "*FloFlyout.xml:465_OnVerticalScroll"]:1> [string "=[C]"]: in function SetVerticalScroll'
[string "@Interface/SharedXML/SecureUIPanelTemplates.lua"]:64: in function <Interface/SharedXML/SecureUIPanelTemplates.lua:63>
[string "=[C]"]: in function `SetValue'
[string "@Interface/SharedXML/SharedUIPanelTemplates.lua"]:216: in function <Interface/SharedXML/SharedUIPanelTemplates.lua:210>

Locals: self = FloFlyoutConfigDialogPopupScrollFrame {
ScrollBar = FloFlyoutConfigDialogPopupScrollFrameScrollBar {
}
offset = 0
ScrollChildFrame = FloFlyoutConfigDialogPopupScrollFrameScrollChildFrame {
}
0 =
}
value = 71.999992
itemHeight = nil
updateFunction = defined @Interface/AddOns/FloFlyout/FloFlyout.lua:1308
scrollbar = FloFlyoutConfigDialogPopupScrollFrameScrollBar {
0 =
ThumbTexture = FloFlyoutConfigDialogPopupScrollFrameScrollBarThumbTexture {
}
ScrollUpButton = FloFlyoutConfigDialogPopupScrollFrameScrollBarScrollUpButton {
}
ScrollDownButton = FloFlyoutConfigDialogPopupScrollFrameScrollBarScrollDownButton {
}
}
(*temporary) = defined =[C]:-1
(*temporary) = FloFlyoutConfigDialogPopupScrollFrameScrollBar {
0 =
ThumbTexture = FloFlyoutConfigDialogPopupScrollFrameScrollBarThumbTexture {
}
ScrollUpButton = FloFlyoutConfigDialogPopupScrollFrameScrollBarScrollUpButton {
}
ScrollDownButton = FloFlyoutConfigDialogPopupScrollFrameScrollBarScrollDownButton {
}
}
(*temporary) = 71.999992
(*temporary) = "attempt to perform arithmetic on local 'itemHeight' (a nil value)"