Zigbee2MQTT 502:Bad Gateway

Hey there,

I’m quite a Newbie to Home Assistant.

As I have bought many Zigbee Devices (Hue, Aqara, etc), I wanted to install zigbee2mqtt but I just fail.

I have a normal home assistant installation on a Raspberry Pi 4, so no docker or similar. So I installed the AddOn in the Superviser Store. I changed the configuration file as told but I just can’t open the WebUI.

Most of the time I get 502:Bad Gateway. A few times I was able to get into the frontend but then it was loading forever.
I googled everywhere and tried many different things but it still doesn’t work. Could you please have a look at my pictures and give me any suggestions where my mistakes are?

Thanks a lot!!