Installed MQTT binding not displaying in Paper UI nor is binding working

Dim · May 25, 2018, 9:11am

try the following:
add as a first line in your $OPENHAB_CONF/services/mqtt.cfg this:

pid: org.openhab.mqtt

why? : MQTT binding not replacing {itemName} - #15 by Dim
(maybe you have stale configs lying around after several trials )