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The error message you’ve encountered is related to the Elementor plugin in WordPress. It seems like there’s an issue with the plugin’s code, specifically in the Controls_Stack class when trying to sanitize settings. Here’s a breakdown of the error:

Argument 1 passed to Elementor\Controls_Stack::sanitize_settings() indicates that the sanitize_settings method of the Controls_Stack class is expecting an array as its first argument.
must be of the type array, null given means that the function received null instead of an array as the argument.
The error occurred when the code called this method in the file /wp-content/plugins/elementor/includes/base/controls-stack.php on line 1084.
To resolve this issue, you can try the following steps:

Check for Plugin Conflicts: Sometimes, conflicts with other plugins can cause such errors. Deactivate other plugins one by one to see if the issue persists when Elementor is the only active plugin.

Update Elementor: Make sure you’re using the latest version of the Elementor plugin. Outdated versions may contain bugs that have been fixed in newer releases.

Check for Theme Compatibility: Your WordPress theme might not be fully compatible with the version of Elementor you’re using. Try switching to a default WordPress theme (e.g., Twenty Twenty-One) temporarily to see if the error still occurs.

Debugging: If the issue persists, you may need to debug the specific code in the Elementor plugin. This usually requires some knowledge of PHP and WordPress development. You can use debugging tools like Xdebug or enable WordPress debugging to get more information about the error.

Contact Elementor Support: If you can’t resolve the issue on your own, consider reaching out to Elementor’s support or community forums. They may have encountered similar issues and can provide guidance on how to fix it.

Backup and Restore: As a last resort, if none of the above solutions work, you can try restoring a backup of your WordPress site to a point before the error occurred. This should revert your site to a stable state, but you’ll lose any changes made after the backup date.

Remember to take proper precautions, such as backing up your site and data, before making any significant changes to your WordPress installation.