I have exact same issue, and tried troubleshoot for a month but gotten nowhere and sadly ssvnc isn't in development since 2011

I love ssvnc, and have tested that most ultravnc-related still works i.e. file-transfer, chat, n/1 scalling etc, but I also cannot get encryption to work

Granted I use ssh-tunneling instead for encryption, but just for the hell of it, also wanted to have encryption working e.g. so that I can point other linux users to ssvnc, as I don't recall seeing other linux viewers ever supporting this(ultravnc encryption).
If anyone ever have some insights on this, it would be very much appreciated!
Edit: Mailed Krunge, just like the OP also did originally. Here's hoping to get a reply this time

(Of course I understand, and don't expect personal support for a free and abandoned project!)
Edit2: Several people have tried contacting Runge throughout the years with no contact, which is odd because he was very responsive before. Then I read this, which I really hope doesn't mean what I think it does:
"He helped us out with an x11vnc chained cert issue back in late Feb. 2010, so I can attest to him being around, and very approachable/communicative, as of 2010.
Out of curiosity, I Googled the heck out of him and it led me to property records where it looks like his wife took over ownership of record for their home in 2014. That may not mean anything, but is not necessarily a good sign, given the dearth of any other activity/results?"
