Why are my GUI Buttons not working inside plugin GUI? ikjlkjhjmk,jm

I have created a simple frame with buttons inside to execute some actions and used it as a plugin GUI, the DockWidgetPluginGui.

The event Activated of the buttons are getting connected, but they are not calling the passed function when pressed.

I have tried changing the event to MouseButton1Click, MouseButton1Down and others, they do not fire as well. I have tried changing the script to a Script instead of LocalScript, nothing changes.

Details:

-- setting basic plugin script:

local ChangeHistoryService = game:GetService("ChangeHistoryService")

local Folder = script.Parent.PluginGuiFolder
local Frame = Folder.Frame

local Selection = game:GetService("Selection")

local widgetinfo = DockWidgetPluginGuiInfo.new(
    Enum.InitialDockState.Float,
    false,   
    false, 
    250, 
    210,    
    250,    
    210     
)

local PluginGui = plugin:CreateDockWidgetPluginGui("GUITools", widgetinfo)
PluginGui.Title = "GUI Tools"

for i, v in pairs(script.Parent.PluginGuiFolder:GetChildren()) do
    v:Clone().Parent = PluginGui
end

local Toolbar = plugin:CreateToolbar("GUI Tools")

local PluginButton = Toolbar:CreateButton(
    "Gui Tools",
    "Tools for quick editing GUI.",
    "rbxassetid://6795025905",
    "Gui Tools") 
PluginButton.ClickableWhenViewportHidden = true

local function disc(x)
    if x then x:disconnect() end
end

PluginButton.Click:Connect(function()
    if not PluginGui.Enabled then
        PluginGui.Enabled = true
    else
        PluginGui.Enabled = false
    end
end)

PluginGui.Changed:Connect(function(property)
    if property == "Enabled" then
        PluginButton:SetActive(PluginGui.Enabled)
    end
end)

-- Button Connection: --------------------------------------------------------------------------------------------

Frame.Centralize.Activated:Connect(function() -- "Centralize" is the name of the button.
    print("Pressed") -- does not fire when pressed, no errors in output
end)