Unable to establish SSL connection.

[chuangtim]

    virtualbox-iso: ~/opsworks-installer.2M9G3YyC ~
    virtualbox-iso: Installing OpsWorks agent version 3432-20160120135248
    virtualbox-iso: Unable to establish SSL connection.
    virtualbox-iso:
    virtualbox-iso: gzip: stdin: unexpected end of file
    virtualbox-iso: tar: Child returned status 1
    virtualbox-iso: tar: Error is not recoverable: exiting now
    virtualbox-iso: /tmp/opsworks/opsworks: line 35: cd: opsworks-agent-installer/opsworks-agent/bin/: No such file or directory
    virtualbox-iso: /tmp/opsworks/opsworks: line 36: ./installer_wrapper.sh: No such file or directory
    virtualbox-iso: env: /opt/aws/opsworks/local/bin/ruby: No such file or directory

Build 'virtualbox-iso' errored: Script exited with non-zero exit status: 127

I can`t Install OpsWorks agent on ubuntu 14.04

ruby version : ruby 2.0.0p384 (2014-01-12) [x86_64-linux-gnu]
VirtualBox Version: 5.0

any thoughts? thank you.