While trying to migrate from Plesk to PPA after the command
ppa-transfer generate-migration-list config.ini
the following error is appeared:
Error while checking connection settings: 'Plesk error : Protocol version '18.104.22.168' is not supported. Current protocol version is '22.214.171.124''.
Current Plesk version is not supported.
Upgrade source Plesk to 8.6 or more.