Hi,
you have to listen to the right topics and levels. E.g. “topic: eventghost” just listens to the single level. If you want to listen to everything on e.g. eventghost you could use “topic: eventghost/#” (see https://www.hivemq.com/blog/mqtt-essentials-part-5-mqtt-topics-best-practices/ for info on levels).
You should use another tool (e.g. MQTT Explorer) to verify the data on your mqtt server.
If all is configured correctly the log should show your mqtt messages.
Kind regard,
Philipp