LibDBIcon usage error

[myrroddin]

On live servers I have an AddOn that uses LibDBIcon, and for the most part, it works as intended. For examples, the lock and unlock, and the radius of the button both work fine. However, my options have a setting to hide the button from the minimap, and when I use it, I get an error, and I can't spot what I've done wrong. I lifted the code from other AddOns, and they don't generate the error.

Error:

3x ...e\Bugger\Libs\LibDBIcon-1.0\LibDBIcon-1.0-34.lua:282: attempt to index field '?' (a nil value)
...e\Bugger\Libs\LibDBIcon-1.0\LibDBIcon-1.0-34.lua:282: in function 'Show'
MyrroUI\MUI_Options.lua:57: in function <MyrroUI\MUI_Options.lua:54>
(tail call): ?
[C]:: ?
[string "safecall Dispatcher[2]"]:9: in function <[string "safecall Dispatcher[2]"]:5>
(tail call): ?
...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0-60.lua:799: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:614>
(tail call): ?
[C]:: ?
[string "safecall Dispatcher[3]"]:9: in function <[string "safecall Dispatcher[3]"]:5>
(tail call): ?
Ace3\AceGUI-3.0\AceGUI-3.0-34.lua:314: in function 'Fire'
...ns\Ace3\AceGUI-3.0-34\widgets\AceGUIWidget-CheckBox.lua:68: in function <...ns\Ace3\AceGUI-3.0\widgets\AceGUIWidget-CheckBox.lua:57>

MyrroUI.lua

local defaults = {
    global = {
        minimap = {
            hide = false,
            lock = false,
            minimapPos = 205,
            radius = 80
        }
    }
}
 
function MyrroUI:OnInitialize()
    -- databroker stuff, works correctly
    DBI:Register("Myrro UI", MyrroUIBroker, self.db.global.minimap)
end

MyrroUI_Options.lua

miniMap = {
    type = "toggle",
    order = 20,
    name = MINIMAP_LABEL,
    desc = L["Show or hide the minimap icon."],
    get = function() return not self.db.global.minimap.hide end,
    set = function(_, value)
        self.db.global.minimap.hide = not value
        if value then
            icon:Show("MyrroUI")
        else
            icon:Hide("MyrroUI")
        end
    end
},
buttonLock = {
    type = "toggle",
    order = 25,
    name = L["Lock Button"],
    desc = L["Lock minimap button and prevent moving."],
    get = function() return self.db.global.minimap.lock end,
    set = function(_, value)
        self.db.global.minimap.lock = value
        if value then
            icon:Lock("MyrroUI")
        else
            icon:Unlock("MyrroUI")
        end
    end
},

[VincentSDSH]

"Myrro UI" vs "MyrroUI"

You're establishing with one name and trying to control with another; I pass a var for this type of thing for precisely this reason.

[myrroddin]

D'oh. In the Register function. Thanks!