White Mage: I have added exception to Windows Defender and Firewall - didn't work. I have also tried to disable both Defender and Firewall - didn't work either. 
  
Apache Ant: please see the attachment - I wasn't able to upload this extention so I needed to make a screenshot. Full description of the file below: 
  
26.04.2019 14:45:12> Error getting login server list |    v Launch.MainWindow.C() |  
26.04.2019 14:45:13> HttpStatusCode = OK |    v Launch.MainWindow.D() |  
26.04.2019 14:45:14> File list is empty, can't update |    v Launch.MainWindow.d() |  
26.04.2019 17:02:05> Error getting login server list |    v Launch.MainWindow.C() |  
26.04.2019 17:02:10> HttpStatusCode = OK |    v Launch.MainWindow.D() |  
26.04.2019 17:02:11> File list is empty, can't update |    v Launch.MainWindow.d() |  
26.04.2019 18:21:59> Error getting login server list |    v Launch.MainWindow.C() |  
26.04.2019 18:22:00> HttpStatusCode = OK |    v Launch.MainWindow.D() |  
26.04.2019 18:22:00> File list is empty, can't update |    v Launch.MainWindow.d() |  
26.04.2019 18:22:53> Error getting login server list |    v Launch.MainWindow.C() |  
26.04.2019 18:22:54> HttpStatusCode = OK |    v Launch.MainWindow.D() |  
26.04.2019 18:22:55> File list is empty, can't update |    v Launch.MainWindow.d() |  
  
Thank you both.