Deprecated: trim(): Passing null to parameter #1 ($string)

Hello
I’m using ACF pro with ACFE to create a front end form .
When trying to retrieve the form on the frontend I get this error: Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in C:\xampp\htdocs\www\wp-content\plugins\acf-extended\includes\modules\form\module-form-hooks.php on line 40
here is the function I’m pointed to :

 
    function prepare_custom_html($value, $post_id, $field){
        
        $custom_html = trim(get_field('acfe_form_custom_html', $post_id));
        
        if($value === false && !empty($custom_html))
            $value = true;
        
        return $value;
        
    }

This is the template I’m using :

<?php
/**
 * Template Name: Custom Template with ACF Form
 */

get_header();

acfe_form('create-job-template'); // Form ID

get_footer();
?>

Not sure if is a development issue or I’m doing something wrong.
Many thanks