Hello,

WP version: 5.6
PHO version: 8.0

When I update my PHP version to 8.0, I have in the admin side this line (3 times):

Warning: Only the first byte will be assigned to the string offset in /home/clients/my-website/wp-includes/class.wp-scripts.php on line 492

Warning: Only the first byte will be assigned to the string offset in /home/clients/my-website/wp-includes/class.wp-scripts.php on line 492

Warning: Only the first byte will be assigned to the string offset in /home/clients/my-website/wp-includes/class.wp-scripts.php on line 492

I thinks that issue is from this module because when I desable the module, these lines are disappeal.

I also made a reseach in the WP forum, I see some explication here:
https://wordpress.org/support/topic/wordpress-5-6-php-8-compatibility-issue/

Can you get a look?
Best regards.
Justin.