Uncaught Error: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "sql_template_single_video" not found or invalid function name
in /var/www/html/thxuknew/wp-includes/class-wp-hook.php on line 324

Call stack:

1. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:348
2. WP_Hook::do_action()
   wp-includes/plugin.php:517
3. do_action()
   wp-content/themes/thx/woocommerce/content-single-product.php:55
4. require('/var/www/html/thxukn...t-single-product.php')
   wp-includes/template.php:812
5. load_template()
   wp-content/plugins/woocommerce/includes/wc-core-functions.php:285
6. wc_get_template_part()
   wp-content/themes/thx/woocommerce/single-product.php:38
7. include('/var/www/html/thxukn...e/single-product.php')
   wp-includes/template-loader.php:106
8. require_once('/var/www/html/thxukn.../template-loader.php')
   wp-blog-header.php:19
9. require('/var/www/html/thxuknew/wp-blog-header.php')
   index.php:17