Hi @hayeskg,
It seems Node-RED resource from Balena blocks is missing or has been removed… not sure why.
Let’s wait for @mpous feedback
EDIT: After some research, I can confirm it has been moved to a new balena organization (balenalabs) and that’s the reason why it fails to fetch it. So, if you change the docker-compose.yml file image to use with the new one bh.cr/balenalabs/balena-node-red I guess it would work 
!!! Please confirm if you test it.
Commit of the change that confirms the new organization.
I’ve opened a PR with the new image changes.