Line 155 functions.php error after installation

Earlier I installed this plugin and since the installation I have been seeing the following error on the Install Plugins page in the box where the tags usually appear:

“Warning: number_format() expects parameter 1 to be double, string given in …./public_html/wp-includes/functions.php on line 155”

Additionally, the WordPress plugin search functionality no longer works.

I have disabled as well as uninstalled/reinstalled the plugin. I have disabled all plugins and reverted back to one of the default WP themes, including Twenty Twelve and Twenty Thirteen. The error persists regardless.

http://wordpress.org/plugins/evolution-google-analytics-code/