Im sorry @Sakin fixed the problem on my own changing
function catchbox_child_theme_setup() {
add_image_size( 'featured-slider', 628, 353, false );
}
add_action( 'after_setup_theme', 'catchbox_child_theme_setup', 11 );
to
function catchbox_child_theme_setup() {
add_image_size( 'featured-slider', 628, 353, true );
}
add_action( 'after_setup_theme', 'catchbox_child_theme_setup', 11 );
that change of false to true did the trick ^^
Thank you anyways