Unparseable date error

Doing a file-share to SharePoint migration with Essentials 2.9.06, I'm getting this error on some source folders:

. Unparseable date: "2021-03-28 01:48:34

The contents of the folder with this error are not migrated.

More analysis to be done, but this looks suspiciously like a locale-related issue

We've been using earlier versions of Essentials for some time and have never seen this.

We're going to roll back to v 2.7 and see if the problem is still there.

Has anyone ever seen this?

Nothing appears on the knowledge base.

Also seeing this error in 2.9.1, but not in version 2.7

Ticket opened.