E-commerce-Checkout dead link

It is probably because you are sharing the database so you cannot have one WP using permalinks as /%postname%/ and the other with ?page_id=XXX. If you separate the databases, my guess is that it should work.

I am guessing but I think it is because the first installation was set to use links as ?page_id=XXX it blocks the second installation from changing it to /%postname%/ which is sensible, from a programming point of view. And when you go back to change the first WP the second WP blocks it form being changed.

When you install the second WP, tell it to create a new database (give the database a different name) that way 2 WP installation won’t share the same database, each one will have their own independent database. Then whatever you do on one WP will not affect the other. Also it will make backing, restoring and maintenance the two blogs much easier later on as your WP blogs grow in size.

Yes, you are right. So this is what I did. I created a new directory and I installed a fresh WP there, then I redirected from my old permalink to the /%postname%/ permalink structure in the .htaccess.
Here is the generater: https://yoast.com/change-wordpress-permalink-structure/
It seems to work,checkout page appears, but lot of setting up to do.
https://dexxtra.eu/detsky-textil/
Thanks a lot for your help, I really appreciate that.

I found the solution, after half day searching! Forget about all these
complex solutinos. Follow these steps, problem will be fixed for sure:

1) Go to “shop” in WP settings => go to “presentation”tab
2) Check “wpsc-shopping_cart_page.php” in theme setting and move template.
3) Click “flush theme cash” to activate live editor in theme editor

4)Go to “display” => “Editor” and locate now “wpsc-shopping_cart_page.php”
5)So in this PHP they have put a standard pemalink to ur shopping cart. My hint
is to visit ur shopping cart, copy the URL from internet.

6) use the search function inside the wpsc_shopping_cart.php and you will have to replace a certain line of code a couple of times in the program, by your own checkout URL.

Replace exactly this line =>

“<?php echo get_option(‘shopping_cart_url’); ?>”
By this =>

“https://www.xxxxxxxx.be/checkout/&#8221;

This will reroute the standard permalink to your shopping cart.

HINT
=====
Make sure you use the correct shortcodes for the corresponding pages!
eg: [productspage] and [transaction-results]… google to know more.

Good luck! This will save u 1 day work!