Plesk Pre-Migration check is stuck, the following message is displayed:
Waiting for the other tasks in the queue...
config.inifile and other migration files were removed or moved from its location.
# ls -lha /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 directory
File Not Found
Plesk Migrator files containing the migration configuration and status were removed or moved from its location, therefore, Plesk Migrator cannot proceed without these files.
Finish the migration and start a new one:
Plesk Migration and Transfer Guide