PHP 8 compatability error

This plugin will not work on higher than PHPv7.4 as “create_function” is no longer supported.

To fix….

In the plugin folder, the file: responsive-posts-widget.php

Change This…

add_action('widgets_init', create_function('', 'return register_widget("responsive_posts");'));

To This

add_action ( 'widgets_init', 'responsive_posts' );
		function responsive_posts() {
		return register_widget('responsive_posts');
		}

And you should be good to go.