Symptoms
-
Migration fails with the following error:
Failed to fetch configuration data from Plesk servers
Cause: Object of type filter is not JSON serializable
That is a critical error, migration was stopped.
Cause
Plesk Migrator bug #PMT-5353, which was fixed in Plesk Migrator 2.26.1 on August, 7.
Resolution
- Update the Plesk Migrator extension.
- Re-start migration process.