Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 81920 bytes) in /home/u183637501/domains/renvexa.com/public_html/wp-includes/class-wpdb.php on line 2357

WordPress database error: [Commands out of sync; you can't run this command now]
SELECT option_name, option_value FROM wp_options WHERE option_name IN ('_transient_doing_cron','_transient_timeout_doing_cron')

WordPress database error: [Commands out of sync; you can't run this command now]
INSERT INTO `wp_options` (`option_name`, `option_value`, `autoload`) VALUES ('_transient_doing_cron', '1772691772.6546549797058105468750', 'on') ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)