Child theme smpl skeleton causes a admin login blank page

Hello,

The child theme of smpl skeleton (the one that is provided with the smpl Skeleton download) seems to cause a conflict.

Version WordPress 4.0, plugins i installed: Yoast (WordPress SEO) and Contact Form 7

I also had the ‘Under construction’ plugin activated. This morning i de-activated this plugin and published the website. Right from this moment i could not access the back-end. The wp-admin page was white. The website was normal. I could browse thru the website but I could nog login anymore. With FTP i renamed the plugin map, created an new plugin map and uploaded every plugin one at a time. I still could not login. Then i renamed the child theme and i could login again. In the back-end i activated the Smpl Skeleton theme (the original one) and the login problems were gone.

Then i remamed again the child theme map to the original name, activated the child theme and de login problems again occured.

In the child theme i did some extra .ccs code and copied the category.php to get rid of the “Category Archives:” complement before the blog title.

.css code:

@import url(“../smpl-skeleton/style.css”);

.imgb {
border:1px solid #cccccc;
}

#navigation li.current_page_item a,
#navigation li.current_page_parent a {
color: ff3700;
background: fff;
}

category.php:

get_header();
do_action(‘skeleton_before_content’);

?>

<h1 class=”page-title”><?php
printf( __( ‘%s’, ‘smpl’ ), ‘<span>’ . single_cat_title( ”, false ) . ‘</span>’ );
?></h1>
<?php
$category_description = category_description();
if ( ! empty( $category_description ) )
echo ” . $category_description . ”;
/* Run the loop for the category page to output the posts.
* If you want to overload this in a child theme then include a file
* called loop-category.php and that will be used instead.
*/
get_template_part( ‘loop’, ‘category’ );
do_action(‘skeleton_after_content’);
get_sidebar();
get_footer();
?>

My website: https://www.webmarketing.nu/ (Dutch)

I realy would like to use the child theme to make use of the updates of WP.

Does anybody have an idea how i can solve this problem?

Thanks!