SNAPSHOT – Missing Timestamp

Created various snapshot successfully, before installing WordPress new at server.

Installed then at new site snapshot plugin once more in order to restore existing snapshot. Now can't restore them • Error: Manifest ITEM does not contain 'timestamp' item.

Below solution provided in forum. It did not work fix missing timestamps. What is missing? What else can I do to fix missing timestamp (manually?).

Thanks
Brandon
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https://premium.wpmudev.org/forums/topic/snapshot-manifest-error-continues-to-keep-occurring?message=closed#post-683043