I apologize if my response is too late, but I wanted to address your question. You might be referring to the Stata package sursol that I created a few years ago.
I’m not actively maintaining this package, and I haven’t used the API-related commands for quite some time.
Regarding your issue, if I remember correctly, this problem occurred due to incorrect server-side settings based on feedback from other users. To troubleshoot, you could try the same job using one of the other API clients available. If you encounter a similar error, it’s likely an issue with the backend settings. In that case, please contact your System Administrator for assistance.
If the issue is specific to the sursol package, I would recommend using the other API client you tested as a workaround