Flows stopped due to missing node types mui_tab mui_group

[cope]

I had problems with my dashboard after a system crash. It is running on a RaspberryPi4 with 2GB RAM with PiOS.

So I removedNodeRed from the system:

sudo npm -g remove node-red
sudo npm -g remove node-red-admin
rm -R ~/.node-red
sudo apt-get remove nodejs

and did a clean install:

bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)

I installed the dashboard with the Manage Palette. Here is my package.json:

cat package.json
{
"name": "node-red-project",
"description": "initially created for you by Node-RED 1.2.6 ",
"version": "0.0.1",
"private": true,
"dependencies": {
"node-red-contrib-homeseer": "~1.0.5",
"node-red-contrib-play-audio": "^2.5.0",
"node-red-dashboard": "~2.26.1",
"node-red-node-pi-gpio": "^1.2.3",
"node-red-node-ping": "^0.2.2",
"node-red-node-random": "^0.3.0",
"node-red-node-serialport": "^0.11.1",
"node-red-node-smooth": "^0.1.2"
}
}

The only node in my flow is a debug node. If I press Deploy then I get:

Flows stopped due to missing node types
mui_tab
mui_group

In the former installation I had the mdashboard installed, but that should be gone right?

I removed the node_modules directory and did a new install, no change in the behaviour.

Any idea where to find the solution?

[E1cid]

I get this sometimes with unused configs. Check to see if you have any unused configuration nodes, if so delete them

[cope]

Great, yes, this was the case.
After deleting the missing nodes things are working fine now.