The issue is that TeamSpeak have changed their servers to use new protocols. CWI are using old version and need to update their servers but I guess they may not maintain their own TS servers.
We need to use an old version of TS to connect to the CWI Server. If you use this link there is a copy of an older TS3 Build (3.1.10):
http://ftp.4players.de/pub/hosted/ts3/releases/3.1.10/http://ftp.4players.de/pub/hosted/ts3/releases/3.1.10/
This is basically the version before 3.2.0 when the new protocols are required.
Going forward we may want to use discord??
The link to discord download:
https://discordapp.com/download
Once you install discord you add the DD Discord channel by using this link below:
https://discord.gg/JQBBmn2