This is because Twitch is under a PubSub blackout. It should have returned by now but it’s only a matter of time before this program wont work at all when they turn down the service on April 14th.
Details here : https://discuss.dev.twitch.com/t/legacy-pubsub-deprecation-and-shutdown-timeline/58043
i have posted earlier asking the developer to update or provide a source so one of us can manage it to work with the new EventSub interface