Node-red runs but get 'invalid config' notification

[lusty crest]

I do use Node-red for a long time without any problem. Had to move complete HA environment to other machine. I believe since the move I get some strange things.
Node-red runs and everything works but in my notification I have an error: 'The following integrations and platforms could not be set up:' , please check your config and log.
Home Assistant Core shows 2 errors:
The log of the first error is: https://gist.github.com/johanvh83/6fdff6514c88019b089fa19152a10e40
the second error is: https://gist.github.com/johanvh83/563bc48262574547127d29737663ef11
Furthermore the Node-red log itself shows almost permanently:
14 Jan 12:34:35 - [info] [mqtt-broker:3922a6cd.ff2dca] Connection failed to broker: mqtt://192.168.2.136:1883
14 Jan 12:35:20 - [info] [mqtt-broker:3922a6cd.ff2dca] Connection failed to broker: mqtt://192.168.2.136:1883
14 Jan 12:36:05 - [info] [mqtt-broker:3922a6cd.ff2dca] Connection failed to broker: mqtt://192.168.2.136:1883
My MQTT broker is installed with default settings and Zigbee2MQTT, which also uses the MQTT broker, works without any problem.
Any advise to resolve is welcome!
Thanks

[lusty crest]

Try to figure out the source problem. Checked Node-red configuration and there is no MQTT config or setting at all.
Wondering why I have this 'Connection failed to broker' errors in the log.

[hasty urchin]

Is your MQTT broker set up as an HA add-on or an external container?

Is 192.168.2.136 actually the IP of whatever is hosting MQTT?

Did the IP possibly change

If you're running HAOS, you'll usually refer to addons by name

[lusty crest]

I use HA in a VM so the MQTT broker is an add-on.

192.168.2.136 is indeed very weird because my own network is 192.168.100.x
For the MQTT broker I don't see any IP setting, only ports but I used the default ones

[hasty urchin]

If you go to the menu in Node RED, hit Configuration nodes, there should be an mqtt-broker node.

Something like that probably

[lusty crest]

Looks incorrect!

have to enter 'mqtt://core-mosquitto:1883'?

[hasty urchin]

Yeah, that should work if they're both addons

[lusty crest]

Hmm

15 Jan 13:28:59 - [info] [mqtt-broker:3922a6cd.ff2dca] Connection failed to broker: mqtt://core-mosquitto
15 Jan 13:29:14 - [info] [mqtt-broker:3922a6cd.ff2dca] Connection failed to broker: mqtt://core-mosquitto

[hasty urchin]

You'll probably need to configure a user/password as well on the security tab

[lusty crest]

Ok, may that be the same user as I use for Z2M or should I create another user for Node-Red?

[hasty urchin]

It'd be up to you. Personally, I prefer to create a user per app, but it'll work either way

[lusty crest]

Ok, then I create an additional one

No, doesn't solve the problem

[hasty urchin]

You may actually not need the scheme in the server

core-mosquitto instead

[lusty crest]

But the core log doesn't show any Node-red issue

15 Jan 13:35:51 - [info] Started flows
15 Jan 13:35:51 - [info] [mqtt-broker:3922a6cd.ff2dca] Connected to broker: mqtt://core-mosquitto
15 Jan 13:35:51 - [info] [mqtt-broker:Mosquitto] Connected to broker: NodeRed@mqtt://localhost:1883
[13:35:51] INFO: Starting NGinx...

[hasty urchin]

That seems to report it's working now

[lusty crest]

Yes Node-Red / MQTT comm seeems ok but when I restart HA, it pops-up with an invalid config for Node-Red

[hasty urchin]

What does the logs say when you go there

[lusty crest]

Same as I sent 13:28

[hasty urchin]

That's an integration problem, not an add-on problem

[lusty crest]

Maybe I should re-install the Node-Red add-on but I'm afraid to loose all flows

[hasty urchin]

Does your nodered integration possibly need to be updated

[lusty crest]

Current version: 20.2.4

Seems latest version from 5th Dec 2025

[hasty urchin]

That's your addon version

[lusty crest]

Euh, what do you mean by integration? I use the add-on

[hasty urchin]

Your error is from the integration to Home Assistant

If you go to Settings -> Integrations, there should be a Node-RED tile to click

[hasty urchin]

That might be from 2021

https://github.com/zachowj/hass-node-red Latest is 4.2.2

[lusty crest]

Oops, do I need this integration? No idea where it comes from honestly

[hasty urchin]

That page lists the things it'll give you

[lusty crest]

Thanks for your help anyway! Highly appreciated! I'll used HACS to update the Node-REd integration

I will check then if the things it provides are necesarry for me

[hasty urchin]

Looks like it's loaded now

[lusty crest]

After update, none of 3 entities I used, so deleted them and deleted the integration.
Thanks once more for all and have a good day!