MQTT integration or extension capability on the app builder

There’s no MQTT and various other IoT protocols features on the platform. The only MQTT extension i’ve seen and imported does not work. all the blocks seems fine but i get an error when i want to test it out.
de.ullisroboterseite.ursai2pahomqtt.aix (311.2 KB)
this is the extension. I don’t know if someone can help me resolve the issue.