Docker non-root access: Error loading config file:stat /home/wu/.docker/config.json

It may be that the .docker folder and the .docker/json.config file is not owned by the current user.

Try this:

sudo chown $USER:docker ~/.docker
sudo chown $USER:docker ~/.docker/config.json
sudo chmod g+rw ~/.docker/config.json

I've got the same error after upgrate from 1.4 to latest. Fix: manually create .docker/config.json ( put empty json object there {} ) and set ownership like this :

-rw-r--r-- 1 myuser docker /home/myuser/.docker/config.json