I am using the 'WordPress Classic' theme. I downloaded and installed the sidebar widgets program and activated it. I now see 'Sidebar Widgets' in the presentation tab, but when I click on it I get the following error:
Fatal error: Call to undefined function: wp_deregister_script() in /home/public_html/journal/wp-content/plugins/widgets/widgets.php on line 204
Any ideas as to what went wrong?