I tried to install NitroPack with step c. after refresh the modification, some terrible things happen, 1) all chinese is messy code. 2) something wrong with the product page

44Notice: Undefined index: special in /data/web/e36450/html/apps/opencart-22022/catalog/controller/module/featured.php on line 51Notice: Undefined index: rating in /data/web/e36450/html/apps/opencart-22022/catalog/controller/module/featured.php on line 57N

and

Notice: Undefined index: reviews in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 264Notice: Undefined index: manufacturer in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 267Notice: Undefined index: reward in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 270Notice: Undefined index: special in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 312Notice: Undefined index: special in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 319Notice: Undefined index: reviews in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 390Notice: Undefined index: rating in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 391 Fatal error: Call to undefined method ModelCatalogProduct::getProductTabs() in /data/web/e36450/html/apps/opencart-22022/vqmod/vqcache/vq2-catalog_controller_product_product.php on line 446

Hello Hao,

Most the errors should be happening because you have enabled GZIP compression in your OpenCart settings. NitroPack is also using GZIP compression and both can not work together. You just have to disable the compression from OpenCart and you should be good to go.

However, if you still have issues with NitroPack, I suggest you to open a support ticket at http://isenselabs.com/users/login where one of our developers can take a look at your issues.

Hope this helps!