404 error ??? created file functions.php

Hello,
speeding up the site there is a 404 error and that takes 2 seconds loading.
URL: http://www.kunst-van-petra.nl/Blogscript-url?ver=mijn-versie-nr

I found the description mijn-versie-nr (dutch language) in the file functions.php create bij making the child-theme.

<?php
/*
* Generated By Orbisius Child Theme Creator – your favorite plugin for Child Theme creation :)
* https://wordpress.org/plugins/orbisius-child-theme-creator/
*
* Unlike style.css, the functions.php of a child theme does not override its counterpart from the parent.
* Instead, it is loaded in addition to the parent’s functions.php. (Specifically, it is loaded right before the parent theme’s functions.php).
* Source: http://codex.wordpress.org/Child_Themes#Using_functions.php
*
* Be sure not to define functions, that already exist in the parent theme!
* A common pattern is to prefix function names with the (child) theme name.
* Also if the parent theme supports pluggable functions you can use function_exists( ‘put_the_function_name_here’ ) checks.
*/

function defer_js_scripts() {
wp_deregister_script(‘script-name’);
wp_register_script(‘script-name’, ‘script-url’,array(),’mijn-versie-nr‘,true);
wp_enqueue_script(‘script-name’);
}
add_action(‘wp_enqueue_scripts’, ‘defer_js_scripts’);

Is this an error in Orbisius and what to do to remove this error?

Can you help me.
Wordpress support has no idea
Kind regards

CvS