I updated the version of wordpress to 3.7 and it immediately broke the site. There is now nothing showing but a white screen and this text:
Fatal error: Call to undefined function wp_get_current_user() in /homepages/21/d398739514/htdocs/wp-includes/user.php on line 215
Can someone tell me what it means? I have filezilla opened and have removed all plug-ins but this doesn't seem to have helped. do I need to delete the 3.7 version of wordpress and install the updated 3.7.1 version?