how does this get such a high rating

.. by appearing to be universal when …

the only way to upload your wpress migration file is via FILE.

and my result is the unhelpful …

“Unable to open file for reading. File: /var/www/html/WordPress/wp-content/plugins/all-in-one-wp-migration/storage/rs0c6r4t932c/xxx.com-links-20230309-120708-6b3s72.wpress