I recently installed Node-Red with their script command ```
bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)
"Welcome to Node-RED
===================
30 Sep 20:03:51 - [info] Node-RED version: v1.1.3
30 Sep 20:03:51 - [info] Node.js version: v12.18.4
30 Sep 20:03:51 - [info] Linux 5.4.51-v7+ arm LE
30 Sep 20:03:52 - [info] Loading palette nodes
30 Sep 20:03:54 - [info] Settings file : /home/pi/.node-red/settings.js
30 Sep 20:03:54 - [info] Context store : 'default' [module=memory]
30 Sep 20:03:54 - [info] User directory : /home/pi/.node-red
30 Sep 20:03:54 - [warn] Projects disabled : editorTheme.projects.enabled=false
30 Sep 20:03:54 - [info] Flows file : /home/pi/.node-red/flows_raspberrypi.json
30 Sep 20:03:54 - [info] Creating new flow file
30 Sep 20:03:54 - [warn]
---------------------------------------------------------------------
Your flow credentials file is encrypted using a system-generated key.
If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.
You should set your own key using the 'credentialSecret' option in
your settings file. Node-RED will then re-encrypt your credentials
file using your chosen key the next time you deploy a change.
---------------------------------------------------------------------
30 Sep 20:03:54 - [info] Starting flows
30 Sep 20:03:54 - [info] Started flows
30 Sep 20:03:54 - [error] Unable to listen on http://127.0.0.1:1880/
30 Sep 20:03:54 - [error] Error: port in use"
Any suggestions how to solve it?