The issue occurs while I'm fetching the relay Metadata. I need the information because I want to know which nips the relay supports.

I use jetty's httpclient for establishing the remote http connection, and your code does not seem to like it.

Looking at the stack trace, I see it cannot link several native libraries, likely because you're on Android.

I don't think the library can be used on android for the above reasons, and to make it work, I would have to ditch jetty, and use the jdk's native libraries for http and websocket connections. This would be a non trivial change that would take time to develop, but I'll look more into it.