vagrant up not working

vagrant up error.gist

pbox: SSH username: vagrant
    pbox: SSH auth method: private key
    pbox:
    pbox: Vagrant insecure key detected. Vagrant will automatically replace
    pbox: this with a newly generated keypair for better security.
    pbox:
    pbox: Inserting generated public key within guest...
    pbox: Removing insecure key from the guest if it's present...
    pbox: Key inserted! Disconnecting and reconnecting using new SSH key...
==> pbox: Machine booted and ready!
==> pbox: Checking for guest additions in VM...
==> pbox: Setting hostname...
==> pbox: Configuring and enabling network interfaces...
==> pbox: Mounting shared folders...
    pbox: /vagrant => C:/Users/Bogdan/workspace
==> pbox: Running provisioner: shell...
==> pbox: Forcing shutdown of VM...
==> pbox: Destroying VM and associated drives...
C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/plugins/provisioners/shell/provisioner.rb:268:in `gsub!': can't modify frozen String (Ru
ntimeError)
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/plugins/provisioners/shell/provisioner.rb:268:in `with_script_file'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/plugins/provisioners/shell/provisioner.rb:61:in `provision_ssh'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/plugins/provisioners/shell/provisioner.rb:27:in `provision'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/lib/vagrant/action/builtin/provision.rb:138:in `run_provisioner'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/lib/vagrant/action/warden.rb:95:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/lib/vagrant/action/warden.rb:95:in `block in finalize_action'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.7/lib/vagrant/action/builder.rb:116:in `call'