sidebar for custom post type

Hi, I just created child theme with a custom post type with the template files single-centri.php and content-single-centri.php I insert in the template file the get_sidebar() function, but when I created a new centri post the sidebar don't work and I just see the word "Array" under the content just before the footer instead that on the right or left side of the post. How can I fix this problem? URL: http://www.waterphysiotherapy.com/es/centro-rehabilitacion/aaa/ Thanks