Fix ERPNext ZATCA XML Error

My ERPNext instance is up and running but the ZATCA (ErpGulf) integration keeps failing on an API call because of an XML syntax error. I have not changed the XML structure myself, so the fault is somewhere in the current setup or the way the payload is being generated. What I need from you: diagnose the root cause of the syntax issue, correct it, and verify that the API call to ZATCA completes without throwing errors. If we discover that the installation is fundamentally broken, I am open to wiping the slate clean and doing a fresh, best-practice deployment, provided we end up with a fully functioning, compliant integration. You will have SSH and ERPNext administrator access as soon as we agree on the scope. Once the fix is in place, a quick walkthrough of the change (or fresh install steps) will help me maintain it going forward. Deliverable: a working ERPNext ↔ ZATCA integration with no XML syntax errors, demonstrated in one successful end-to-end transaction.

Project ID: 40343542