WP Admin them issue

I am now getting the following error when i login to wp-admin. Blogs say it is theme related. The page is blank with error shown below.

www.stagingforce.com/agent/wp-admin

Fatal error: Call to undefined function wp_removable_query_args() in /home/cp17828423/public_html/agent/wp-admin/includes/misc.php on line 900

Any ideas?

Hello there,

Thank you for letting us know about it. I am afraid that it isn’t related to the theme’s issue. That’s actually a WordPress core file. Could you please try to manually update your WordPress via FTP? Please refer here.

Regards,
Kharis