My Blog site Crashed

[jasondevvarma]

I'm using another account under my company, Smilemiddle, under the username, 'blogsm' This is the page '​http://www.smilemiddle.com/blog/wp-admin/'

I was trying to add a short code on CSS Editor -
'<?php echo do_shortcode([wmls name="Posts Menu" id="1"]); ?>'

I had added it to the theme-defaults.php file i think. Right after i clicked update. It crashed.
How do i fix it. Btw, i'm gettting a error code when i use the link above
'The www.smilemiddle.com page isn’t working
www.smilemiddle.com is currently unable to handle this request.
HTTP ERROR 500'

[jasondevvarma]

This is the error i get.

[jasondevvarma]

This was the plugin that i think is causing the problem. i added a code to the bottom of the theme-defaults.php (i think)

[pothi]

Welcome to WordPress Trac where the bugs in WordPress core are discussed, troubleshooted and possibly fixed. Unfortunately, your site's issues do not seem to belong to WordPress core. You may try posting the issue/s in the ​WordPress Support Forums and hopefully someone will chip in there.