PHP Fatal error when sending e-mail

greetings,

since installing Deliverability, my initial tests with WPForms worked well, however since this time we have discovered that other e-mails from WordPress are crashing PHP and temporarily take the site offline.

the errors logs show:
PHP Fatal error: Uncaught Error: Call to undefined function TopDeliverability\get_plugin_data() in /home/customername/public_html/wp-content/plugins/deliverability/src/PluginVersionProvider.php:11

these are caused when my backups finish (using UpdraftPlus) and it generates and e-mail to me or whenever my security plugin (Sucuri Security) goes to send me notifications about logins or other security events.

is the function get_plugin_data() the one that is part of wpadmin? are you missing a check or an include statement somewhere?

i can provide stack dumps if you wish. basically every time something goes to send e-mail it causes this to crash. i have received notifications from the wordpress emergency recovery notification that it’s Deliverability causing the problem.

my site is running WordPress 6.6.2 with PHP 8.2.

many thanks in advance,

cheers, Wiz!!