why when I go to the page [Manufacturers or Brands] Brands that I add the missing and get an error like this picture? Please help me
Hello.
Please check AbanteCart error log. (http://forum.abantecart.com/index.php/topic,834.msg3085.html#msg3085)
You probably need to check your web server error log for error 500. Something happening with your Apache web server and PHP