remove action not working

I am trying to remove an action but it isn’t being removed

This is what I have in functions.php

add_action( 'sensei_single_quiz_questions_after', 'remove_action_buttons', 10, 0 );

function remove_action_buttons() {
		
    	remove_action( 'sensei_single_quiz_questions_after', array( 'Sensei_Quiz', 'action_buttons' ), 10, 0  );
	
}
	
add_action( 'sensei_single_quiz_questions_after', 'new_action_buttons' );

function new_action_buttons() {

The original add action is

add_action( ‘sensei_single_quiz_questions_after’, array( ‘Sensei_Quiz’, ‘action_buttons’ ), 10, 0 );

It is definitely going into the function that calls the remove but the buttons are still there on the page. It calls the replacement ok and adds those buttons. Thanks