PHP 8.0.0 to PHP 8.0.25 - Object of class GdImage could not be converted to string

Zen Cart 1.5.7c
Database Patch Level: 1.5.7c
PHP Version: 8.0.25 (Zend: 4.0.25)
Server OS: Linux 4.18.0-372.32.1.lve.el8.x86_6

The PHP version on our shared server was upgrade from PHP 8.0.0 to PHP 8.0.25. I added a new product to my catalogue on the back-end, but when I try to open the new category on the front-end I get this error message in the logs:

PHP Fatal error: Uncaught Error: Object of class GdImage could not be converted to string in /home/ccfsecur/domains/ccfsecuritysystems.co.za/public_html/includes/classes/bmz_image_handler.class.php:851

protected function save_imageGD($file_ext, $image, $dest_name, $quality = 75) 
    {
        // -----
        // Initially, santitize the quality input for use by imagejpeg; values should
        // be in the range 0-100.
        //
        $quality = (int)$quality;
        if ($quality < 0 || $quality > 100) {
            $quality = 75;
        }
        $this->ihLog("save_imageGD($file_ext, $image, $dest_name, $quality)");
        switch (strtolower($file_ext)) {
            case '.gif':
                if (!function_exists('imagegif')) {
                    $this->ihLog("save_imageGD, imagegif function does not exist");
                    return false;
                }
                $ok = imagegif($image, $dest_name);
                break;
            case '.png':
                if (!function_exists("imagepng")) {
                    $this->ihLog("save_imageGD, imagepng function does not exist");
                    return false;
                }
                
                // -----
                // The quality input for imagepng requires an integer value in the
                // range 0-9.  If the value's out-of-range, use a proportional setting
                // based on the input.
                //
                if ($quality > 9) {
                    $quality = (int)(9 * $quality / 100);
                }
                $ok = imagepng($image, $dest_name, $quality);
                break;
            case '.jpg':
            case '.jpeg':
                if (!function_exists("imagejpeg")) {
                    $this->ihLog("save_imageGD, imagejpeg function does not exist");
                    return false;
                }
                $ok = imagejpeg($image, $dest_name, $quality);
                break;
            default: 
                $ok = false;
                break;
        }
        imagedestroy($image);
    
        return $ok;
    }

Line 851 is:

$this->ihLog("save_imageGD($file_ext, $image, $dest_name, $quality)");

I have just "comment out" line 851 by placing // informt of the code, and it seems to work. Did I do the right thing, or did I break something else?
I'm new to PHP, any assist will be appreciated.

Your Image Handler mod needs updating.