> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://doc.common-services.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Error: AJAX script execution failed

You may see an error like:

> AJAX execution failed. Please first verify your module configuration. If the problem persists please send a screenshot of this page to the support.

Several possible causes. The most common: the domain you use for the back office does **not** match the one configured in PrestaShop → the browser blocks the request (cross-domain).

Example: you open the BO at `http://mystore.com/admin` while PrestaShop is set to `http://www.mystore.com/admin`.

**Fix:** log in with **exactly** the same URL as in shop settings (SEO & URLs / domain).

Other possibilities:

1. Timeouts / PHP / FastCGI (script cut off) — see [PHP configuration limitations](https://doc.common-services.com/en/article/…/) and [FastCGI CDiscount](https://doc.common-services.com/en/article/fastcgi-cdiscount-sc1uve/).
*(Replace the PHP link with your new EN article URL once published.)*
2. Host security rules (e.g. OVH) on AJAX / permissions. Follow your host’s recommendations.
3. Shop in maintenance, front office unreachable, or blocking redirects. The module needs a working shop.

If it persists: screenshot of the **Information** tab + [Support](https://doc.common-services.com/en/article/support-cdiscount-3q3l4m/).