What can cause products not to be shipped?

Question

PHP

In general, I took the "All Products" module for opencart and began to rewrite it under the 2.0 version. Everything seemed to be set up and done correctly, but for some reason the goods are not displayed.
Taken from the catalog. Sources: Link

Answer 1

I found the error through the Error Log in Open Cart. I fixed and rewrote everything, the script is ready for use. If you need it, you can take it. All sources on git'e.

Answer 2

You should use a debugger to study how this functionality works and fix errors.