I was waiting for someone to answer who uses twitch, which I don't. You could use the "search" function to search for the word twitch to see if anyone else is asking/answering your question. If you don't have it already, you might need to do something like the below. It seems I usually fail when answering questions that turn out to be related to twitch, because I answer them according to what a normal irc network does which conforms to the normal irc rules. If you're still having trouble connecting, see https://forums.mirc.com/ubbthreads....ted-auth-connecting-to-twitch#Post268085

ON *:LOGON:*: {
  if ($network == twitch) {
    raw CAP REQ :twitch.tv/membership
    raw CAP REQ :twitch.tv/commands
    raw CAP REQ :twitch.tv/tags