Symptoms
The pre-migration check is stuck at the following message
Pre-migration checks
Waiting for the other tasks in the queue...The
config.inifile and other migration files were removed or moved from their location.Linux
# ls -l /usr/local/psa/var/modules/panel-migrator/sessions/<session>/config.ini
ls: cannot access /usr/local/psa/var/modules/panel-migrator/sessions/<session>/config.ini: No such file or directoryWindows
dir "%plesk_dir%varmodulespanel-migratorsessions<session>config.ini
...
File Not Found
Cause
Plesk Migrator needs the files that contain the migration configuration and status, and can't continue because they've been removed.
Resolution
Finish this migration and start a new one: Plesk Migration and Transfer Guide