I've been trying to figure this out, but i cannot talk to my computer over MQTT by sending notifications or anything.
Solution
So i got it all working. I just removed everything off my pc and ha and reinstalled it all. The one thing that tripped me up in the docs on the "latest" branch is you don't have the new integration setup but it is on the "beta" branch. Other than that I was able to get everything up and running without issue.