could you provide the API log as this document told:

https://support.docusign.com/s/document-item?language=en_US&rsc_301&bundleId=jux1643235969954&topicId=poz1578456669909.html&_LANG=enus

Or for a more accurate understanding of your issue, I recommend including a screenshot.

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Hi Evgeny, 

Here is a link that might help → https://support.docusign.com/s/articles/Unable-To-Create-The-Envelope-When-Using-a-Template?language=en_US&rsc_301

Hi @Evgeny,

I hope you are doing well.

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Best regards,

Christopher | Docusign Community Moderator

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