Hello,
Could you provide temporary wp-admin access?
Was the header.php file re-written via the child theme? If so, edit the child theme header.php file, compare it with the existing parent theme header.php, and add the necessary changes that we did in the latest version.
Do you use cache plugin? Try to disable it and check then.
Regards
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.