[PMT-3078] Plesk migrator fails to copy content after the initial account transfer

Plesk 12.5 with latest #MU applied and Plesk Migrator v. 1.14.11 release 0 on both source and destination servers.
I'm trying to migrate one client and step 1, "transfer-accounts", works fine. However, step 2, when I'm trying to sync the content using "copy-content", keeps failing with the following error:
[...]
Running: /usr/local/psa/admin/sbin/modules/panel-migrator/plesk-migrator copy-content --skip-services-checks --migration-list-file...

[PMT-3078] Plesk migrator fails to copy content after the initial account transfer