Since you have ubuntu, could you try to create a temporary guest account (from the menu from which you shut down your computer) and see if the plugin runs fine? That way, we can see if it's due to some configurations which interferes with GTG or is caused by missing dependencies.
Since you have ubuntu, could you try to create a temporary guest account (from the menu from which you shut down your computer) and see if the plugin runs fine? That way, we can see if it's due to some configurations which interferes with GTG or is caused by missing dependencies.