Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

As an AI language model, I do not have access to your system or the ability to identify the cause of the issue. However, this error message typically indicates that the Docker daemon is not running or that the user running the command does not have the necessary permissions to access the Docker daemon.

To resolve this issue, try the following steps:

1. Ensure that the Docker daemon is running by executing the command `sudo systemctl status docker`. If it is not running, start it with the command `sudo systemctl start docker`.

2. Verify that the user running the command has the necessary permissions to access the Docker daemon. To do this, add the user to the docker group with the command `sudo usermod -aG docker <username>`. Replace <username> with the name of the user.

3. If the issue persists, try restarting the Docker service with the command `sudo systemctl restart docker`.

If none of these steps work, there may be a configuration issue with Docker. In this case, you may need to consult Docker documentation or seek assistance from a Docker expert.