WPML Sticky Links - Deprecated Error on PHP 8.x

Overview of the issue

If you are using WPML Sticky Links plugin with PHP 8.x, you will find a deprecated error like the following:

PHP Deprecated: Automatic conversion of false to array is deprecated in .../wp-content/plugins/wpml-sticky-links/classes/class-wpml-sticky-links.php on line 19

Workaround

Please, make sure of having a full backup of your site before proceeding.

• Open …/wp-content/plugins/wpml-sticky-links/classes/class-wpml-sticky-links.php file.
• Look for line 19.
• Just before this line of code:

  			$this->settings['sticky_links_widgets'] = 0;
  

• Add the following:

  			if (!is_array($this->settings)){
  				$this->settings = array();
  			}