This section contains troubleshooting articles

Cannot GET /

When opening Node-RED, the following error message appears: Cannot GET /

Broken Node-RED flows

This tutorial shows how you can recover Node-RED flows that are stuck in an endless loop of crashing.

Node-RED: Not properly configured nodes (annoying for deployment)

How to fix not properly configured nodes in Node-RED: The workspace contains some nodes that are not properly configured.

Connection to MQTT server fails after importing flows

When copying mqtt-in flows from old Node-RED flow (weaving_DCCAachen) the input nodes can’t connect.

Loosing the overview over Node-RED flows

What you can do when loosing the overview over Node-RED flows

Recovering Node-RED flows

Recovering accidently changed or deleted Node-RED flows.

PLCs returning negative values / garbage values

PLC returning negative values