TimDHodges

I just tried installing the same plugin for a client’s website and got a similar error. Deactivating the plugin got the website working again.

Site URL: http://thedesignfactory.ca/

In loading the website in Mozilla Firefox I get a much more detailed error than Google Chrome.

Fatal Error (hide details) (remove)

The site encountered a problem that it cannot recover from. Please use the following information to try to resolve the problem.
Error Message

Fatal Error: Call to undefined function has_shortcode() in /home/designfactory1/public_html/wp-content/plugins/wordpress-seo/frontend/class-twitter.php on line 91

Description

The WordPress SEO plugin code created an error that caused PHP execution to fail.

The code tried to run a function that doesn’t exist (has_shortcode()). This type of error is typically caused by a simple typo (is_hom() rather than is_home()), by calling a function provided by a plugin when that plugin is not activated, by calling a function before it is ready (such as calling a function before the code that creates it has run), or by using a function that no longer exists (the function may have been removed from WordPress core or the plugin/theme that previously supplied it).
Solutions

Invalid code modifications can cause this problem. If you have made any modifications to the plugin, remove them and try to load the site again.
It is possible that this plugin’s code is out of date and that an upgrade is available. Check with the plugin’s author to see if an upgrade is available.
There may be a conflict with another plugin running on the site. Try upgrading the other plugins on the site. A plugin conflict can be ruled out by deactivating all the other active plugins on the site and checking to see if the error still occurs.
The WordPress SEO plugin may not have been fully uploaded. Uploading the plugin again could fix the issue. Important: If you do this, you will lose any modifications made to the plugin.

Error Source Details
Type Plugin
Name WordPress SEO
Version 2.2.1
Author Team Yoast
Path ***/wp-content/plugins/wordpress-seo
File frontend/class-twitter.php
Other Software Details
WordPress Version 3.5.1
PHP Version 5.4.37
Full Error Details
Type Fatal Error (E_ERROR)
Message Call to undefined function has_shortcode()
File ***/wp-content/plugins/wordpress-seo/frontend/class-twitter.php
Line 91
Type Description This type of error indicates that PHP cannot continue to run the code. Typical causes of this type of error are code bugs that have typos, missing or incomplete files (such as a file that was only partially uploaded), and the code using more memory than it is allowed.