Replace this line
add_theme_support( 'post-thumbnails');
With
add_theme_support( 'post-thumbnails', array( 'post', 'page', 'slider', 'events', 'testimonial', 'menus', 'reservations', 'product' ) );
in linofeast/functions.php and see. If it doesn’t works then if you can provide us WP Logins to your website with URL then we can take a closer look at it. Make sure you set the post as private reply so that only admin can see your wp-logins.
