yachinyou

go to wp-includes/template.php

Insert this chunk of code

// in wp-includes/post-template.php
/**
 * Get the specific template name for a page.
 *
 * @since 3.4.0
 *
 * @param int $id The page ID to check. Defaults to the current post, when used in the loop.
 * @return string|bool Page template filename. Returns an empty string when the default page template
 *  is in use. Returns false if the post is not a page.
 */
function get_page_template_slug( $post_id = null ) {
    $post = get_post( $post_id );
    if ( 'page' != $post->post_type )
        return false;
    $template = get_post_meta( $post->ID, '_wp_page_template', true );
    if ( ! $template || 'default' == $template )
        return '';
    return $template;
}

After this chunk of code

function get_page_template() {
	$id = get_queried_object_id();
	$template = get_page_template_slug();
	$pagename = get_query_var('pagename');

	if ( ! $pagename && $id ) {
		// If a static page is set as the front page, $pagename will not be set. Retrieve it from the queried object
		$post = get_queried_object();
		$pagename = $post->post_name;
	}

	$templates = array();
	if ( $template && 0 === validate_file( $template ) )
		$templates[] = $template;
	if ( $pagename )
		$templates[] = "page-$pagename.php";
	if ( $id )
		$templates[] = "page-$id.php";
	$templates[] = 'page.php';

	return get_query_template( 'page', $templates );
}

That’s what worked for me. Good luck!