technical issues on my them Travelicious

when i open any link in my site i receive this message

Fatal error : Uncaught Error: Call to undefined function bt_get_tour_single_data_single_view() in /home/cairopri/public_html/wp-content/themes/travelicious/views/tour/header/based_on_content.php:2 Stack trace: #0 /home/cairopri/public_html/wp-includes/template.php(772): require() #1 /home/cairopri/public_html/wp-includes/template.php(716): load_template(’/home/cairopri/…’, false, Array) #2 /home/cairopri/public_html/wp-includes/general-template.php(204): locate_template(Array, true, false, Array) #3 /home/cairopri/public_html/wp-content/themes/travelicious/php/before_framework.php(125): get_template_part(‘views/tour/head…’) #4 /home/cairopri/public_html/wp-content/themes/travelicious/header.php(89): boldthemes_header_headline(Array) #5 /home/cairopri/public_html/wp-includes/template.php(770): require_once(’/home/cairopri/…’) #6 /home/cairopri/public_html/wp-includes/template.php(716): load_template(’/home/cairopri/…’, true, Array) #7 /home/cairopri/public_html/wp-includes/general-template.php(48): locate_template(A in /home/cairopri/public_html/wp-content/themes/travelicious/views/tour/header/based_on_content.php on line 2

Notice : ob_end_flush(): failed to send buffer of zlib output compression (0) in /home/cairopri/public_html/wp-includes/functions.php on line 5107

Hi,

Contact with your purchase item author hope they will helped!

Thanks!