Problem with installing Zigbee2mqtt with cc2531

Hi guys, I need some help! I came from pimatic to home assistant because I couldn’t get it stable… after some tweaking I got Hassio working well! At the moment I have:
RPI3B with an Arduino and also a relayshield working on it. The relayshield is for my sealing light. I have a Mi-Light bridge connected by limitlessLed and some networking scanning for home detection by Nmap. Now I came at the point I want some sensors so my house can control itself. Idea is to use xiaomi sensors with Zigbee2mqtt. But after some attempts of installing I can’t get it to work…
I flashed the CC2531 with the firmware as mentioned with the flasher and software from TI. I think it works?? I really dont know how to check this. And followed the complete steps as mentioned on github. I installed node version 11.x but Zigbee2mqtt is still mentioning that I installed the wrong node version…

My config of Zigbee2mqtt is:
{ "data_path": "/share/zigbee2mqtt", "homeassistant": true, "permit_join": true, "mqtt_base_topic": "zigbee2mqtt", "mqtt_server": "mqtt://homeassistant", "serial_port": "/dev/ttyACM0" }

My config at mosquito broker:
{ "logins": [], "anonymous": false, "customize": { "active": false, "folder": "mosquitto" }, "certfile": "fullchain.pem", "keyfile": "privkey.pem" }

And my error at Zigbee2mqtt:
Info] Configuration file found. Will overwrite configurable fields with values from add-on configuration
[Info] Configuration written to /share/zigbee2mqtt/configuration.yaml
2018-11-20T21:39:48: PM2 log: Launching in no daemon mode
2018-11-20T21:39:49: PM2 log: App [npm:0] starting in -fork mode-
2018-11-20T21:39:49: PM2 log: App [npm:0] online

[email protected] start /zigbee2mqtt-0.2.0
node index.js
Zigbee2mqtt requires node version >=8.11 10, you are running v8.11.4!
zigbee2mqtt:info 2018-11-20 21:39:55 Logging to directory: ‘/share/zigbee2mqtt/log/2018-11-20.21-39-55’
zigbee2mqtt:info 2018-11-20 21:39:57 Starting zigbee2mqtt version 0.2.0 (commit #unknown)
zigbee2mqtt:info 2018-11-20 21:39:57 Starting zigbee-shepherd
zigbee2mqtt:info 2018-11-20 21:40:01 zigbee-shepherd started
zigbee2mqtt:info 2018-11-20 21:40:01 Coordinator firmware version: ‘undefined’
zigbee2mqtt:info 2018-11-20 21:40:01 Currently 0 devices are joined:
zigbee2mqtt:warn 2018-11-20 21:40:01 permit_join set to true in configuration.yaml.
zigbee2mqtt:warn 2018-11-20 21:40:01 Allowing new devices to join.
zigbee2mqtt:warn 2018-11-20 21:40:01 Set permit_join to false once you joined all devices.
zigbee2mqtt:info 2018-11-20 21:40:01 Zigbee: allowing new devices to join.
zigbee2mqtt:info 2018-11-20 21:40:01 Connecting to MQTT server at mqtt://homeassistant
zigbee2mqtt:info 2018-11-20 21:40:02 zigbee-shepherd ready
events.js:183

Error: Connection refused: Not authorized
at MqttClient._handleConnack (/zigbee2mqtt-0.2.0/node_modules/mqtt/lib/client.js:920:15)
at MqttClient._handlePacket (/zigbee2mqtt-0.2.0/node_modules/mqtt/lib/client.js:350:12)
at work (/zigbee2mqtt-0.2.0/node_modules/mqtt/lib/client.js:292:12)
at Writable.writable._write (/zigbee2mqtt-0.2.0/node_modules/mqtt/lib/client.js:302:5)
at doWrite (/zigbee2mqtt-0.2.0/node_modules/readable-stream/lib/_stream_writable.js:428:64)
at writeOrBuffer (/zigbee2mqtt-0.2.0/node_modules/readable-stream/lib/_stream_writable.js:417:5)
at Writable.write (/zigbee2mqtt-0.2.0/node_modules/readable-stream/lib/_stream_writable.js:334:11)
at Socket.ondata (_stream_readable.js:639:20)
at emitOne (events.js:116:13)
at Socket.emit (events.js:211:7)
npm
ERR! code ELIFECYCLE
npm ERR! errno 1
npm
ERR! [email protected] start: node index.js
npm
ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2018-11-20T21_40_41_654Z-debug.log
2018-11-20T21:40:41: PM2 log: App [npm:0] exited with code [1] via signal [SIGINT]
2018-11-20T21:40:41: PM2 log: App [npm:0] starting in -fork mode-
2018-11-20T21:40:41: PM2 log: App [npm:0] online

[email protected] start /zigbee2mqtt-0.2.0
node index.

Thanks for the help in advance guys!!!

Are you sure you use the correct firmware?

Firmware on the CC2531 or on the raspberry?

On the CC2531.

Yes, I got it all working now

How did you get it working? What did you change/fix? I’m also having problems.