Not able to complete Lab 1

Hello Experts,

I am trying to cope up with the LAB1. I am able to download the vagrant, the box. I have successfully been able to execute Vagrant up. i see the box started successfully.

When trying to ssh i get an error.

vagrant ssh
/opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/safe_exec.rb:39:in exec': Permission denied - /Users/stilwalli//ssh (Errno::EACCES) from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/safe_exec.rb:39:inexec'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/ssh.rb:209:in exec' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/builtin/ssh_exec.rb:39:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_running.rb:16:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_accessible.rb:18:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_created.rb:16:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_virtualbox.rb:26:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/builder.rb:116:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/runner.rb:66:in block in run' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/busy.rb:19:inbusy'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/runner.rb:66:in run' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:239:inaction_raw'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:208:in block in action' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:190:inblock in action'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:194:in action' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/commands/ssh/command.rb:66:inblock in execute'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/plugin/v2/command.rb:238:in block in with_target_vms' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/plugin/v2/command.rb:232:ineach'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/plugin/v2/command.rb:232:in with_target_vms' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/commands/ssh/command.rb:46:inexecute'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/cli.rb:54:in execute' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/environment.rb:291:incli'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/bin/vagrant:164:in <main>' /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/safe_exec.rb:39:inexec': Permission denied - /Users/stilwalli//ssh (Errno::EACCES)
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/safe_exec.rb:39:in exec' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/ssh.rb:209:inexec'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/builtin/ssh_exec.rb:39:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_running.rb:16:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_accessible.rb:18:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_created.rb:16:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/providers/virtualbox/action/check_virtualbox.rb:26:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/warden.rb:34:incall'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/builder.rb:116:in call' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/runner.rb:66:inblock in run'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/util/busy.rb:19:in busy' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/action/runner.rb:66:inrun'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:239:in action_raw' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:208:inblock in action'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:190:in block in action' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/machine.rb:194:inaction'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/commands/ssh/command.rb:66:in block in execute' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/plugin/v2/command.rb:238:inblock in with_target_vms'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/plugin/v2/command.rb:232:in each' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/plugin/v2/command.rb:232:inwith_target_vms'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/plugins/commands/ssh/command.rb:46:in execute' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/cli.rb:54:inexecute'
from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/lib/vagrant/environment.rb:291:in cli' from /opt/vagrant/embedded/gems/2.1.5/gems/vagrant-2.1.5/bin/vagrant:164:in