Something wrong with Docker-n-docker

$ docker login registry.local
Warning: failed to get default registry endpoint from daemon (Cannot connect to the Docker daemon at tcp://docker:2375. Is the docker daemon running?). Using system default: https://index.docker.io/v1/ 
Cannot connect to the Docker daemon at tcp://docker:2375. Is the docker daemon running? 
ERROR: Build failed: exit code 1 

Yesterday it’s worked, today it’s broken.