Hello,
I have created a temporary ftp account and added the login details to the ftp info in the grey box on top.
I had a few deletion requests these past days, but when I tried to delete them through the extension, I got something of an error: 1054 Unknown column 'qq' in 'field list'. The account was not removed. I was, however, able to delete the account without problems in Joomla (Community Builder) itself.
I noticed that these deletions came through Kunena, I assume you had enabled the Kunena deletion request button. I disabled it again, as I only want the deletion request button to show up on the JA-GDPR user info page.