Error with Snapshot migration

I'm trying to migrate moseley-realestate.com from my spi.us multisite to my image1plus.com multisite using Snapshot. I've moved several sites in the same manner with no problem but in this case I get an error- "Manifest ITEM does not contain 'timestamp' item." I found a solution from over 2 years ago for that error at https://premium.wpmudev.org/forums/topic/snapshot-manifest-error-continues-to-keep-occurring?message=closed#post-683043 but the settings describe then do not exist in my Snapshot version. Any idea what my problem might be.