How to figure out if the topbar is enabled? [closed]

The code is in a localscript, and makes TopbarEnabled false ok, but before and after it isn't willing to print whether TopbarEnabled is currently true or false

When I include the print commented at line 2 it breaks the pcall

pcall(function() 
    --print(game.StarterGui:GetCore("TopbarEnabled"))
    game.StarterGui:SetCore("TopbarEnabled", false)
end)

while wait(1) do
    print("Starting new attempt")
    pcall(function()
        print(game.StarterGui:GetCore("TopbarEnabled"))
    end)
end