Error reason: The visibility for the workflow documents is set to Hidden. This means the signers cannot view or interact with the documents in steps.
Solution: Each step must have at least one visible document. Select the necessary document, go to the Visibility section, and adjust the document visibility settings.
If the document is hidden in the step settings, click the needed step, go to the Documents section, and adjust the document visibility settings.
Learn more about document access and visibility settings in this article.