Hi Andrew, this appears to be an issue with making a secure connection (HTTPS and WSS) to our servers. Are you using https:// and wss:// urls as opposed to http:// and ws:// ?
Can you send me the code you are using related to making the connection (perhaps through email)?
Ah, I just responded to your email, but I missed this earlier, thanks! There's a possibility that this version might be the issue, in my research I do see some of these errors appearing for older versions of Unity. Is it possible for you to use a newer version of Unity?