why change this file?

because the site logo image URL is always http iso the correct https.
because of this problem, the site https://www.wautom.com is displayed without the correct padlock so it shows the site is not secure while in Site Account it is now SSL enabled.

My solution:
Change this file:

Searching for: — HEADER START —
D:\wautom_20171202\mesocolumn\lib\functions\hooks-functions.php(39): <!– HEADER START –>

<a href=”<?php echo home_url( ‘/’ ); ?>” title=”<?php bloginfo(‘name’); ?>”><img src=”<?php echo $get_header_logo; ?>” alt=”<?php bloginfo(‘name’); ?>” /></a>

change to:

<a href=”<?php echo home_url( ‘/’ ); ?>” title=”<?php bloginfo(‘name’); ?>”><img src=”<?php echo str_replace(‘http:’, ‘https:’, $get_header_logo); ?>” alt=”<?php bloginfo(‘name’); ?>” /></a>

==> then it works fine now.