Hello, @Javier,
Sorry for the inconvenience but you wrote: “so I installed that plugin believing it would be working, but is not the case.” so we misunderstood that you used some third-party plugin.
Well, I have tested it at my end on my test site and found it is working perfectly for me, so could you please share your site WP Admin URL and Credentials and also the FTP Logins as well as listed below under the private content area of this topic, so that we will check it for you on your site and help you out.
WP Admin URL:
WP Admin Username:
WP Admin Password:
FTP Host:
FTP Username:
FTP Password:
FTP Port:
Regards 8Themes Team.