en WordPress.com Forums › Support Upgrading WordPress to 2.5.1 Author Posts May 8, 2008 at 7:47 pm #225966 mabybrynMember After uploading 2.5.1 files I get the following error message in Dashboard: Fatal error: Call to undefined function has_action() in /home/bhillsbl/public_html/blog/wp-admin/includes/plugin.php on line 403 May 8, 2008 at 8:11 pm #226124 jamesewelchMember You’re in the wrong forums. This is for WP.com. You need WordPress.org for the wordpress software. WP.com is just for blogs hosted on WP.com domain. Author Posts The topic ‘Upgrading WordPress to 2.5.1’ is closed to new replies.