[Solved] PHP Notice: Trying to access array offset on value of type null
A couple of those found in debug log. wpForo and WP latest versions, PHP 7.4.x
[14-May-2021 12:48:30 UTC] PHP Notice: Trying to access array offset on value of type null in /home/public_html/wp-content/plugins/wpforo/wpf-includes/class-actions.php on line 223
Thank you for letting us know, we'll check and fix this for the next update.