I have no experience with wordpress but I am helping my friend with her website, I have just upgraded to the new version of wordpress and when I log into the dashboard I get the following message:-
Fatal error: Call to undefined function: has_action() in /home/a/n/angelsintolight/public_html/blog/wp-admin/includes/plugin.php on line 403
I have no idea how to fix this error, can anyone help at all??
THANK YOU SO MUCH