PHP 8.0 error: Call to undefined function create_function

Hello.

Our theme’s revslider plugin is reporting the following error when switching to PHP 8.0:

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[30-Jan-2023 15:29:41 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function create_function() in /mnt/.../wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php:258 Stack trace: #0 /mnt/.../wp-content/plugins/revslider/revslider.php(86): RevSliderFunctionsWP::registerWidget() #1 /mnt/.../wp-settings.php(447): include_once('...') #2 /mnt/.../wp-config.php(106): require_once('...') #3 /mnt/.../wp-load.php(50): require_once('...') #4 /mnt/.../wp-blog-header.php(13): require_once('...') #5 /mnt/.../index.php(17): require('...') #6 {main}   thrown in /mnt/.../wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php on line 258

We just upgraded our Unicon theme (Version: 2.3.2) and I have updated to the latest Slider Revolution version found in your forum (V6.6.10), but the issue remains…

Thanks in advance.

Ticket