Quote Originally Posted by Design75 View Post
For some reason you are loading a lot of scripts twice. That could be a reason for the error.
Thanks a lot for your tip! I removed recurring scripts, but DPU still doesn't work. However i noticed that head tags was in <body> section ( like here http://www.zen-cart.com/showthread.p...-gt-lt-head-gt ) so i reupload language pack files, and now everything working great.