PHP Fatal error – AntiSpam 6.5

Hi,

I am getting the following error on one of my WP sites which is causing the site to crash.

www.DOMAIN.co.uk [Wed Mar 08 17:05:46 2023] [error] [client 212.159.2.201:0] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught TypeError: Unsupported operand types: int - ArrayObject in /home/sites/2a/3/3d61eaa003/public_html/wp-content/plugins/cleantalk-spam-protect/inc/cleantalk-common.php:779\nStack trace:\n#0 /home/sites/2a/3/3d61eaa003/public_html/wp-content/plugins/cleantalk-spam-protect/inc/cleantalk-public.php(619): ct_get_checkjs_value()\n#1 /home/sites/2a/3/3d61eaa003/public_html/wp-content/plugins/cleantalk-spam-protect/inc/cleantalk-public.php(526): ct_add_hidden_fields('ct_checkjs', false, true, true)\n#2 /home/sites/2a/3/3d61eaa003/public_html/wp-includes/class-wp-hook.php(308): apbct_hook__wp_head__set_cookie__ct_checkjs('')\n#3 /home/sites/2a/3/3d61eaa003/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)\n#4 /home/sites/2a/3/3d61eaa003/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)\n#5 /home/sites/2a/3/3d61eaa003/pub

This error keeps repeating in the log.

The site is running WP 6.1.1. and PHP 8.0.27

Thanks for any help.