Document sent for e-signature cannot be opened by recipient

A document sent for e-signature cannot be opened by recipient.

This document requires four signatures, and three have been successfully verified. However, for the fourth signature, the recipient reports "file not found" error on attempting to open to e-sign.

This fourth recipient is in China, near Shenzhen. We successfully communicate with him by email on a regular basis.

The other four recipients are in Charlotte, North Carolina; Honolulu, Hawaii; and Beijing, China. They all received their documents, opened them and e-signed successfully.

Please help. This signature is contingent on closing a substantial contract, which is on hold because of a defect in the Adobe e-signature process.

Document created with Acrobat 2023.003.20284 Mac, which was updated a few days ago. Document received by Outlook Mail Windows.