Symptoms
Cannot properly initiate Tools & Settings > Migration & Transfer Manager with the following error in Plesk interface:
Note: Plesk versions specified in error message may vary
Version of Plesk on the target server (18.0.33) is lower than version of Plesk on the source server 'source' (18.0.36). Migration to lower version of Plesk is not supported by migration tool.
Cause
Migration from newer to older versions is not supported. The Plesk version on the destination server should be equal or higher than the Plesk version on the source server.
Resolution
As a workaround, it is possible to use the Site Import Extension to import websites and mail from the source Plesk server to the destination one.
Additional Information
What are the known limitations of Plesk Migrator Extension?