How to swap between widgets ingame

I made a widget for a main menu screen. i made play button quit button and im currently working on the instructions button. i want to make it so when i click on it, it instantly shows the instructions widget screen i made myself. in that screen there is a back button that will swap back to the main menu screen when clicked. i put function, when clicked, open widget instructions screen but it seems to not worked for some reason. it says the widget screen is protected and it opens outside the game. i do not know the reason of this someone please i beg for your help

Try a “remove from parent” node and reference the image or widget or whatever to get rid of.