This relates to the memory limit you have it seems

 // ----- Get 'memory_limit' configuration value
    $v_memory_limit = ini_get('memory_limit');
    $v_memory_limit = trim($v_memory_limit);
    $last = strtolower(substr($v_memory_limit, -1));

    if($last == 'g')
        //$v_memory_limit = $v_memory_limit*1024*1024*1024;
        $v_memory_limit = $v_memory_limit*1073741824;
    if($last == 'm')
        //$v_memory_limit = $v_memory_limit*1024*1024;
        $v_memory_limit = $v_memory_limit*1048576;
    if($last == 'k')
        $v_memory_limit = $v_memory_limit*1024;

You could check the code to see if it conforms to the above and your memory limit to ensure it is with acceptable parameters.

@jinkazama82it please confirm if you're using PHP7. Thank you.