Have you tried:
– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the Twenty Eleven theme to rule out any theme-specific problems.
– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
– re-uploading all files & folders – except the wp-content folder – from a fresh download of WordPress.
It may be in your theme “all setting” page is enable.
you can check in code for following syntax
add_options_page( __( ‘All Settings’ ), __( ‘All Settings’ ), ‘administrator’, ‘options.php’ );
n check in your function.php of your theme and can comment or change the needful.
