Hi Andis,

The issue occurs because your live server uses an internal or self-signed SSL certificate, which Hansa server does not trust. This is expected behavior — certificate validation ensures secure communication and cannot be bypassed for live environments.

Your test server works because it uses a publicly trusted certificate. To fix this, please install a valid public SSL certificate on your live endpoint (e.g., from Let’s Encrypt or another recognized CA).

For debugging, we recommend using SendWebRequest4, as it allows full control of parameters and request logging.
If the file transfer is from your system to StandardERP, you can also consider using our REST API upload feature.

Regards.