Node-red-contrib-s7 broken after 3.0.0 update

it has been mentioned

I suspect you are using the IoT boxes that Siemens have not updated beyond node v8? If so, you essentially have an obsolescence issue (node 8 is EOL)

See this

If you can, move to Raspberry PI (much cheaper + up-to-date) (or any of the industrialised boxes based on RPi)