There has been a critical error on this website with v6.0.1 and WP v6.3.2

Hi,

I’ve just done updates my the website, and now getting the dreaded ‘There has been a critical error on this website’ message, disabling the Post My CF7 Form plugin allows the page to load.

I’ve had a look at the server log and I’m getting the following:

PHP Fatal error: Uncaught Error: Call to undefined function c2p_get_form_key() in /var/www/vhosts/xxxxxxx.org/httpdocs/wp-content/plugins/post-my-contact-form-7/public/class-cf7-2-post-public.php:177

WordPress v 6.3.2
CF7 Smart Grid Design Extension v4.15.4
Conditional Fields PRO v2.1.2
Contact Form 7 v5.5.6
Post My CF7 Form v 6.0.1
PHP v7.3.25

Note that on the live site I’ve restored a backup so the error no longer exists. Thanks for any support you can provide to get this resolved. x

The page I need help with: [log in to see the link]