Node-red doesn't open anymore

Hi there.
I got a problem with Nodered. Til 7 days ago everything works good. I installed Grafana on the same Pi and all good. Since yesterday Nodered is dead. I tried to reboot the pi, to stop the service and restart it. I stopped Grafana.service too but nothing.
Nodered is not starting but in background my flows are working but from my browser I can't reach my instance.

This is what happening when I type node-red

Welcome to Node-RED

28 Apr 19:48:54 - [info] Node-RED version: v2.2.2
28 Apr 19:48:54 - [info] Node.js version: v14.19.0
28 Apr 19:48:54 - [info] Linux 5.10.92-v8+ arm64 LE
28 Apr 19:48:54 - [info] Loading palette nodes
28 Apr 19:48:57 - [info] Dashboard version 3.1.6 started at /ui
28 Apr 19:48:58 - [info] Settings file : /home/pi/.node-red/settings.js
28 Apr 19:48:58 - [info] Context store : 'default' [module=memory]
28 Apr 19:48:58 - [info] User directory : /home/pi/.node-red
28 Apr 19:48:58 - [warn] Projects disabled : editorTheme.projects.enabled=false
28 Apr 19:48:58 - [info] Flows file : /home/pi/.node-red/flows.json
28 Apr 19:48:58 - [error] Uncaught Exception:
28 Apr 19:48:58 - [error] Error: listen EADDRINUSE: address already in use 0.0.0.0:1880
at Server.setupListenHandle [as _listen2] (net.js:1331:16)
at listenInCluster (net.js:1379:12)
at doListen (net.js:1516:7)
at processTicksAndRejections (internal/process/task_queues.js:83:21)

What I see is the [error] Error: listen EADDRINUSE: address already in use 0.0.0.0:1880 but I can't figure it out how to fix it and if is this the problem that won't permit to open Nodered on my browser.

Does anyone have an idea on how to fix it?

Thanks,
Mattia

This problem usually indicates that node-red is already running and thus port 1880 is already in use.

Check the pi's IP address.

Try sudo systemctl restart nodered

I did right now but nothing as changed.
The IP is still the same and I'm connected via SSH and it is connected the PI.

What I get with node-red is still the same.
I tried even to use the command sudo systemctl status nodered and what I get is this:

nodered.service - Node-RED graphical event wiring tool
Loaded: loaded (/lib/systemd/system/nodered.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2022-04-28 20:08:54 CEST; 53s ago
Docs: Redirecting…
Main PID: 4144 (node-red)
Tasks: 31 (limit: 8987)
CPU: 20.149s
CGroup: /system.slice/nodered.service
├─4144 node-red
├─4177 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 5 100
├─4179 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 5 100
├─4180 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 18 100
├─4182 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 18 100
├─4183 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 18 100
├─4185 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 18 100
├─4186 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 13 100
├─4188 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 13 100
├─4189 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 6 100
├─4191 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 6 100
├─4192 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 12 100
├─4194 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 12 100
├─4195 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 12 100
├─4197 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 12 100
├─4198 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 26 100
├─4200 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 26 100
├─4201 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 26 100
├─4203 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 26 100
├─4205 /bin/bash /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio out 26 100
└─4207 python3 -u /home/pi/.node-red/node_modules/node-red-node-pi-gpio/nrgpio.py out 26 100

Apr 28 20:08:59 pi-casa Node-RED[4144]: your settings file. Node-RED will then re-encrypt your credentials
Apr 28 20:08:59 pi-casa Node-RED[4144]: file using your chosen key the next time you deploy a change.
Apr 28 20:08:59 pi-casa Node-RED[4144]: ---------------------------------------------------------------------
Apr 28 20:08:59 pi-casa Node-RED[4144]: 28 Apr 20:08:59 - [info] Starting flows
Apr 28 20:09:00 pi-casa Node-RED[4144]: 28 Apr 20:09:00 - [error] [openhab2-in:0213439286e8efa5] TypeError: Cannot read property 'addListener' of null
Apr 28 20:09:00 pi-casa Node-RED[4144]: 28 Apr 20:09:00 - [info] Started flows
Apr 28 20:09:01 pi-casa Node-RED[4144]: 28 Apr 20:09:01 - [info] [mqtt-broker:Tasmota] Connected to broker: mqtt://192.168.1.121:1883
Apr 28 20:09:01 pi-casa Node-RED[4144]: 28 Apr 20:09:01 - [info] [alexa-remote-account:523a6fa2.e43cc8] intialising with the PROXY method and saved data...
Apr 28 20:09:03 pi-casa Node-RED[4144]: 28 Apr 20:09:03 - [info] [openhab2-controller2:Openhab] Opened connection to http://192.168.1.121:8080/rest/events?topics=openhab/items
Apr 28 20:09:04 pi-casa Node-RED[4144]: 28 Apr 20:09:04 - [info] [openhab2-controller2:Openhab] Connection established. Emitting 161 InitialEvents.

Nodered in background still working and for example via Openhab I can turn the light on and off but I can't access to the graphical typing on the browser my-ip:1880

I don't know if openhab makes a difference to running node-red because I don't use it.

Can you access the NR editor from a different computer? A different browser?
Try clearing your browser cookies.

ps. Obviously you know that it's the Pi's IP not your PC's in "my-ip:1880"

I tried to open it from a different browser but nothing changed, still not opening the web interface in the meanwhile in background everything works.

On the Pi I installed a Raspbian lite and on it I installed Openhab, Nodered, Mosquitto and Grafana. So Nodered it doesn't work only for Openhab. They are different software over a same machine.

Of course I'm using the Pi's IP.
I can't understand what's going on and still facing this problem