For the past few weeks, I haven't been able to log into my Dashboard. I can access the login page, but when I submit my password and user name, I get a page with this message:
Fatal error: Call to undefined function wp_is_mobile() in /home/content/l/a/b/labanster/html/wp-admin/index.php on line 24
My site is hosted on GoDaddy. I called them and they told me it was a problem within WordPress and they couldn't fix it. Does someone know what's going on? My site's URL is http://www.highclasscaricature.com.