FTP Downloads app : can't connect to a server over TLS


So I’d like my EX2 Ultra to be able to download some files on a remote FTP server (over TLS).

To do this, I’ve tried to setup a task within the “FTP Downloads” app like so (made up host):

Then when I click on “Browse” for choosing the source directory, I get an error message saying the authentication failed.

I’m assuming the problem originates from TLS because my host, username and password are correct and it works in FileZilla (explicit FTP over TLS).

So what should I do to initiate an FTPS connection to a remote server?
Do you know another way to make my EX2 download some files from a remote FTP server over TLS?

Thanks in advance.