# Flows stopped due to missing node types mui\_tab mui\_group
**URL:** https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-mui-tab-mui-group/38317
**Category:** Dashboard
**Created:** [31 December 2020 11:41 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-mui-tab-mui-group/38317 "2020-12-31T11:41:05Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@cope](https://discourse.nodered.org/u/cope)
#### Post date: [31 December 2020 11:41 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-mui-tab-mui-group/38317/1 "2020-12-31T11:41:05Z")
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](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?
---
### Author:  [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [31 December 2020 11:55 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-mui-tab-mui-group/38317/2 "2020-12-31T11:55:34Z")
I get this sometimes with unused configs. Check to see if you have any unused configuration nodes, if so delete them
---
### Author:  [@cope](https://discourse.nodered.org/u/cope)
#### Post date: [31 December 2020 12:23 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-mui-tab-mui-group/38317/3 "2020-12-31T12:23:00Z")
Great, yes, this was the case.
After deleting the missing nodes things are working fine now.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [14 January 2021 12:23 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-mui-tab-mui-group/38317/4 "2021-01-14T12:23:12Z")
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