New answers tagged notices
Find file where is register_sidebar ( must be on theme folder or plugins ) add ID to sidebar register_sidebar( array( 'name' => __( 'Main Sidebar', 'theme-slug' ), 'id' => 'change_me', // Add only this line 'description' => __( 'Widgets in this area will be shown on all posts and pages.', 'theme-slug' ), 'before_widget' => ...
Looks like you have a very old theme. You'll have to search the functions.php file for register_sidebar and make sure the $args follow the format mentioned in the codex.
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