Hi @Zoltan,
Welcome to the Docusign Community—great to have you here!
We understand the challenges with IDnow verification process have been for you, and we're sorry for the disruption it's causing your workflow. Know that we're here to help you move forward.
This article outlines some common issues that can arise during IDNow verification, such as the envelope missing a signing order or corrections made by the sender 👉 Docusign Identify (powered by IDnow or AriadNext) - Frequently Asked Questions
Based on what you've described, it appears that the error message indicates the transaction was marked as complete prematurely, thereby preventing further progress. It's possible that due to the technical problem, IDnow cancelled the identification process.
Unfortunately, this means a new envelope will be required. Therefore, we recommend reaching out to your sender to resolve.
I hope this helps. If you feel like my suggested solution has helped you or pointed you in the right direction, we would greatly appreciate it if you would consider liking and marking it as "Best Answer" ✅, to help other community members find trusted answers and follow similar steps. 
Let us know if you have questions— we're here for you!
 
Regards,
Melanie | Docusign Community Moderator
If this helped, feel free to Like👍and click "Best Answer"