Lightroom CC: Can not connect to FTP Server

Hi there,

when i start Lightroom CC on my Macbook (Catalina) i get an error: Can not connect to FTP Server (or in German: Kein Verbindungsaufbau mit FTP Server möglich). I tried all avaible versions 3.0-3.3

Any ideas?

It does work perfectly on my Ipad or Iphone.

Many Thanks!