Shall we dance ?

Fatal error: Uncaught Error: Call to undefined function DanceStudioAmour_the_posts_navigation() in /home/xs019764/amour123.com/public_html/wp-content/themes/DanceStudioAmour/index.php:33 Stack trace: #0 /home/xs019764/amour123.com/public_html/wp-includes/template-loader.php(106): include() #1 /home/xs019764/amour123.com/public_html/wp-blog-header.php(19): require_once('/home/xs019764/...') #2 /home/xs019764/amour123.com/public_html/index.php(17): require('/home/xs019764/...') #3 {main} thrown in /home/xs019764/amour123.com/public_html/wp-content/themes/DanceStudioAmour/index.php on line 33