New Install of HA - Sensor will not connect to mosquitto

I had Home Assistant, MQTT running on my Pi 3B just fine last year. I started it back up this year after a long period of a great depression when my Grandson passed away tragically.

I plugged it back in today and did all the updates. I noticed that it no longer did auto-discovery. I started playing around trying to get the feel of the new look. That’s when I lost my front end home screen.

Being that I hadn’t used it in a while, I figured it wouldn’t hurt to do a fresh install and just start over.

MQTT installed and started, now, I find my devices can’t log onto MQTT? Any advice is greatly appreciated.