IRC Server irc.rrgv.org port 6697 #prpg Use SSL - Do not accept invalid SSL certificates.
Online IRC client, in case your client malfunctions: https://kiwiirc.com/client
Note that you will have to click "Server and network" and set it to irc.rrgv.org, port 6697.
Another one suggested by swicked: https://client00.chat.mibbit.com/?url=irc://irc.rrgv.org:6697/%23prpg
It is recommended not to use the server name (megavolt.rrgv.org) or those of the other servers (fatcat.ferazelhosting.net, nimnul.ferazelhosting.net) for IRC. Besides causing problems should the name of the server change, the SSL certificate the IRC server uses is only for the name irc.rrgv.org.