template temp-jquerygallery.php can't be found throws weird link and 404 error

I’ve written a new template for my custom theme and I get the following error in Chrome dev tools:
(index):521 GET https://doubledogproductions.com/gresla-wp/menu-test/%3Cbr%20/%3E%3Cb%3ENoti…temp-jquerygallery.php%3C/b%3E%20on%20line%20%3Cb%3E64%3C/b%3E%3Cbr%20/%3E 404 (Not Found)

The correct url path is : https://doubledogproductions.com/gresla-wp/wp-content/themes/gresla/temp-jquerygallery.php and it’s used in page slug “menu-test”

I’ve tried saving it with different names, creating new file and overwriting the one on the server. All of my other templates work perfectly but this new one.

My Template Name code is as follows:

<?php
/**
 * Template Name: Template-Jquery Gallery
 *
 * current ver. 1.0
 * author: Dani Dudovick, Double Dog Productions
 *
 * @package WordPress
 * @subpackage gresla
 * @since gresla ver. 1.0
 */
 ?>

Thanks in advance!
DDDoubledog