I solved it like this:
uninstalled node-red-node-pi-gpiod 1.0.6 (The basic Node-RED node for Pi GPIO)
installed: node-red-node-pi-gpiod 0.0.13 (A node-red node for PiGPIOd)
npm install node-red-node-pi-gpiod
sudo nano /etc/rc.local
added line:
/usr/bin/pigpiod
restarted the pi, tested with telnet if port 8888 is running.
implemented nodes and works...