Fatal eror-Как исправить не входить в админку?

Fatal error: Uncaught Error: [] operator not supported for strings in /var/www/apteka24.tj/data/www/apteka24.tj/wp-content/plugins/revslider/includes/framework/base-admin.class.php:71 Stack trace: #0 /var/www/apteka24.tj/data/www/apteka24.tj/wp-content/plugins/revslider/admin/revslider-admin.class.php(465): RevSliderBaseAdmin::addMetaBox('Revolution Slid...', '', Array, NULL) #1 /var/www/apteka24.tj/data/www/apteka24.tj/wp-content/plugins/revslider/admin/revslider-admin.class.php(72): RevSliderAdmin->addSliderMetaBox() #2 /var/www/apteka24.tj/data/www/apteka24.tj/wp-content/plugins/revslider/admin/revslider-admin.class.php(44): RevSliderAdmin->init() #3 /var/www/apteka24.tj/data/www/apteka24.tj/wp-content/plugins/revslider/revslider.php(165): RevSliderAdmin->__construct('/var/www/apteka...') #4 /var/www/apteka24.tj/data/www/apteka24.tj/wp-settings.php(254): include_once('/var/www/apteka...') #5 /var/www/apteka24.tj/data/www/apteka24.tj/wp-config.php(90): require_once('/var/www/apteka...') #6 /var/www/apteka24.tj/data/www/ in /var/www/apteka24.tj/data/www/apteka24.tj/wp-content/plugins/revslider/includes/framework/base-admin.class.php on line 71