WP Toolkit Scan procedure finishes with successful green mark, but WordPress instances cannot be found.
Following error can be found in
/var/log/plesk/panel.logusing debug mode:
Unable to process "/": filesystem::recursive_directory_iterator increment error: Permission denied
Folders/files with incorrect permissions exist at the subscription level.
Such behavior is recognized as a bug with ID EXTWPTOOLK-9679.
Connect to the server via SSH.
Move problem files/folders outside of the affected subscription:
# mv /var/www/vhosts/example.com/wrong_data /root/
Scan for WP instances again.