Blank Page While Move to child folder

Hi,

I move about-me.html to child folder but I change stylesheet linked to it's parent folder, but while I do change on items below

<link rel="stylesheet" href="../style.css" type="text/css" />
it's causing white blank page. Can you help me to figure it out?

The full stylesheet content that I do change as below:
<!-- Stylesheets
============================================= -->
<link href="https://fonts.googleapis.com/css?family=Lato:300,400,400i,700|Raleway:300,400,500,600,700|Crete+Round:400i" rel="stylesheet" type="text/css" />
<link rel="stylesheet" href="../css/bootstrap.css" type="text/css" />
<link rel="stylesheet" href="../style.css" type="text/css" />
<link rel="stylesheet" href="../css/dark.css" type="text/css" />
<link rel="stylesheet" href="../css/font-icons.css" type="text/css" />
<link rel="stylesheet" href="../css/animate.css" type="text/css" />
<link rel="stylesheet" href="../css/magnific-popup.css" type="text/css" />

<link rel="stylesheet" href="../css/responsive.css" type="text/css" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />

Thanks

Thanks for your reply.

Here is the mainpage:
http://travelmo.id/staging

While I put on child folder it's goes white blank with URL as below:
http://travelmo.id/staging/tentang-kami/

thanks