Error starting userland proxy: listen TCP 0.0.0.0:9000: Listen: address already in use

After the server went down
Run and restart docker

docker start 41xxxxxxxad0

Error starting userland proxy: listen TCP 0.0.0.0:9000: listen: address already in use
The view port must be sudo

Sudo netstat -pna | grep 9000
remember the PID number

Kill off:

sudo kill 5763

To restart again

docker start 41xxxxxxxad0

Ok!