Trying to access array offset on value of type bool

I get this error “Trying to access array offset on value of type bool” in /yith-woocommerce-product-add-ons/includes/class-yith-wapo-front.php

In line 594: <?php echo esc_attr( get_option( ‘yith_wapo_tooltip_color’ )[‘background’] ); ?>

See code:

/* TOOLTIP */
                .yith-wapo-block .yith-wapo-addon .yith-wapo-option .tooltip span {
                    background-color: <?php echo esc_attr( get_option( 'yith_wapo_tooltip_color' )['background'] ); ?>;
                    color: <?php echo esc_attr( get_option( 'yith_wapo_tooltip_color' )['text'] ); ?>;
                }