The sound issue might be caused by multiply soundcards / output devices using. We are looking into this issue.
The second issue indicates problems with connection to servers. How offten do you experience it? Please check that router/software is not blocking ports 7770, 8089, 5672, 5222, 8080, 21020-21036, 7401-7600 for the game, also turn off all programs which use internet heavily (like torrent programs, netflix clients, k9 web protection filters etc.), disable antivirus, firewall any other protection/filtering software, also, you can try to put your router into DMZ mode.