Just downloaded/installed with my 1.5.4 version store. The Abandoned Cart Report displays correctly, however, when I attempt to send an email nothing happens. And, I found this in the error logs

[25-Aug-2019 21:20:06 UTC] PHP Fatal error: Call to undefined function zen_get_info_page() in /home/www/myStore/includes/classes/usu.php on line 324
Where does this function live? Did it get moved or renamed maybe?

Here is the code referenced in the error message....
PHP Code:
// Add the cPath to the start of the parameters if present
        if(is_string($cPath)) array_unshift($p, 'cPath=' . $cPath);

        $this->log('Parsing Parameters for ' . $page);
        $this->log(var_export($p, true));

        $container = array();
        foreach ($p as $index => $valuepair){
            $p2 = @explode('=', $valuepair);

            switch ($p2[0]){
                case 'products_id':
                    // Make sure if uprid is passed it is converted to the correct pid
                    $p2[1] = zen_get_prid($p2[1]);

                    switch(true) {
                        // Handle product urls (check page against handler)
                        case ($page == zen_get_info_page($p2[1])): //LINE 324

                            // If a cPath was present we need to determine the immediate parent cid
                            $cID = null;
                            if(array_key_exists('cPath', $container)) {
                                $cID = strrpos($container['cPath'], '_');
                                if($cID !== false)
                                {
                                    $cID = substr($container['cPath'], $cID+1);
                                }
                                else {
                                    $cID = $container['cPath'];
                                }

                                if(USU_CATEGORY_DIR != 'off' || USU_CPATH != 'auto') {
                                    unset($container['cPath']);
                                }
                            }
                            $url = $this->make_url($page, $this->get_product_name($p2[1], $cID), $p2[0], $p2[1], USU_END, $separator);
                            break; 
This seems like a good tool to attempt to close the sale with an abandoned cart, but not if it can't generate and send emails.

Thanks for any help you can offer.

FYI - I get the same result when installing on a 1.5.5 version store as well.