Runtime Error: Encryption not available on this event-machine

[foadnh]

I'm on CentOS 7,
Now I get following error:

$ lita
[WARNING] MultiJson is using the default adapter (ok_json).We recommend loading a different JSON library to improve performance.
terminate called after throwing an instance of 'std::runtime_error'
what(): Encryption not available on this event-machine
Aborted (core dumped)

I have openssl and openssl-devel installed.

[jimmycuadra]

Sorry you're having trouble getting Lita working. I don't think this issue is related to lita-slack. You just need the right dependencies on your system before installing/compiling the eventmachine gem. A quick Google search indicates libssl-dev might be the package eventmachine is expecting.

[foadnh]

Lita is working fine with config.robot.adapter = :shell config, so I thought maybe it is a problem with lita-slack.
Also libssl-dev in CentOS is named as openssl-devel, which I have installed. I have uninstalled and installed eventmachine, but nothing changed!

[jimmycuadra]

I mean it's not an issue with lita-slack as in this has to do with the dependencies of eventmachine and not any of lita-slack's own code. I don't have much experience with CentOS personally, but hopefully someone who does can chime in with ideas about what might be wrong.

[ghost]

I had this exact same problem. The eventmachine gem must be installed when a valid ssl dependency exists so it can be configured with it. While not on CentOS (Ubuntu xenial 16.04), I solved this exact same error message by installing libssl-dev package and re-installing the eventmachine gem.

[rhoml]

I can confirm that reinstalling libssl-dev and eventmachine fixes the issue