Problem using PHP > 8.0

Hi!

I got following error using php > 8.0:

Got error 'PHP message: PHP Fatal error:  Uncaught TypeError: imp
lode(): Argument #2 ($array) must be of type ?array, string given in /<SOME PATH>/wp-content/plugins/contact-form-7-to-database-extension/
CF7DBPlugin.php:849\nStack trace:\n#0 /<SOME PATH>/wp-content/plugins/contact-form-7-to-database-extension/CF7DBPlugin.php(849): implode()
\n#1 /<SOME PATH>/wp-content/plugins/contact-form-7-to-database-extension/CFDBIntegrationContactForm7.php(55): CF7DBPlugin->saveFormData()
\n#2 /<SOME PATH>/wp-includes/class-wp-hook.php(309): CFDBIntegrationContactForm7->saveFormData()\n#3 /<SOME PATH>/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()\n#4 /<SOME PATH>/wp-includes/plugin.php(522): WP_Hook->do_action()\n#5
/<SOME PATH>/wp-content/plugins/contact-form-7/includes/submission.php(617): do_action_ref_array()\n#6...', referer: <SOME URL>