Box 'scotch/box' could not be found. about scotch-box HOT 7 CLOSED

$ vagrant --version
Vagrant 1.7.1

$ vagrant box add scotch/box --insecure

$ vagrant box add scotch/box --insecure
==> box: Loading metadata for box 'scotch/box'
    box: URL: https://atlas.hashicorp.com/scotch/box
==> box: Adding box 'scotch/box' (v1.0.2) for provider: virtualbox
    box: Downloading: https://atlas.hashicorp.com/scotch/boxes/box/versions/1.0.2/providers/virtualbox.box
==> box: Successfully added box 'scotch/box' (v1.0.2) for 'virtualbox'!
$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'scotch/box'...
==> default: Matching MAC address for NAT networking...
==> default: Checking if box 'scotch/box' is up to date...
==> default: There was a problem while downloading the metadata for your box
==> default: to check for updates. This is not an error, since it is usually due
==> default: to temporary network problems. This is just a warning. The problem
==> default: encountered was:
==> default: 
==> default: SSL certificate problem: self signed certificate in certificate chain
==> default: More details here: http://curl.haxx.se/docs/sslcerts.html
==> default: 
==> default: curl performs SSL certificate verification by default, using a "bundle"
==> default:  of Certificate Authority (CA) public keys (CA certs). If the default
==> default:  bundle file isn't adequate, you can specify an alternate file
==> default:  using the --cacert option.
==> default: If this HTTPS server uses a certificate signed by a CA represented in
==> default:  the bundle, the certificate verification probably failed due to a
==> default:  problem with the certificate (it might be expired, or the name might
==> default:  not match the domain name in the URL).
==> default: If you'd like to turn off curl's verification of the certificate, use
==> default:  the -k (or --insecure) option.
==> default: 
==> default: If you want to check for box updates, verify your network connection
==> default: is valid and try again.
==> default: Setting the name of the VM: my-project_default_1419766646626_36888
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
    default: Adapter 2: hostonly
==> default: Forwarding ports...
    default: 22 => 2222 (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
    default: SSH address: 127.0.0.1:2222
    default: SSH username: vagrant
    default: SSH auth method: private key
    default: 
    default: Vagrant insecure key detected. Vagrant will automatically replace
    default: this with a newly generated keypair for better security.
    default: 
    default: Inserting generated public key within guest...
    default: Removing insecure key from the guest if its present...
    default: Key inserted! Disconnecting and reconnecting using new SSH key...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
    default: The guest additions on this VM do not match the installed version of
    default: VirtualBox! In most cases this is fine, but in rare cases it can
    default: prevent things such as shared folders from working properly. If you see
    default: shared folder errors, please make sure the guest additions within the
    default: virtual machine match the version of VirtualBox you have installed on
    default: your host and reload your VM.
    default: 
    default: Guest Additions Version: 4.2.0
    default: VirtualBox Version: 4.3
==> default: Setting hostname...
==> default: Configuring and enabling network interfaces...
==> default: Mounting shared folders...
    default: /var/www => /Users/admin/Sites/my-project