@Koen-Schockaert Maybe Onion guys optimized (or made) the Node-Red package only for Omega2 Pro - I don't know exactly. Unfortunately I don't have any genuine Onion Omega2 Pro, I don't use the web based UI (Onion OS or OnionOS - whatever the 'OS' means here and I haven't tried the Node-Red package (the Node-Red Graphical Programming interface) yet.