MJ Dimmer Switch with Tasmota MQTT Connection Failed

I purchase the following switch flashed with Tasmota but it doesn’t seem to connect to my mosquito mqtt broker.

TASMOTA Smart Dimmer Switch by… https://www.amazon.com/dp/B0BC42G66B?ref=ppx_pop_mob_ap_share

The error message is …

Connect failed to homeassistant.local:1883, rc -5. Retry in 120 sec

I’m pretty much stuck. Because I have a sonoff zigbee bridge which is configured exactly the same and works. Same wifi network. Same mqtt settings.

Here are the mqtt settings on the dimmer.

Does anybody have an idea?

Did you ever fix this? I cannot for the life of me get anything, including MQTT exploreer, to connect to my MQTT server on a raspberry pi running HA.