OH2 don't even try to connect to mqtt

[Dim (Angelos)]

I think that if you re-install the mqtt-action, it will be ok…

see:
i) [MQTT with MQTT Action] MQTT Binding will not connect with action installed · Issue #5038 · openhab/openhab1-addons · GitHub &
ii) MQTT Stopped Working HELP! - #6 by nekmech

and edit mqtt.cfg to remove mqtt from the action line

Ps: addons.cfg