oppia: SSL error when downloading dependencies (?)

Good day. I am trying to run Oppia on the local machine. After the vagrant machine has been initialized with ‘vagrant up’, localhost:8181 sent no response. So I followed this instructions and executed the following commands:

'vagrant ssh'
'cd /home/vagrant/oppia'
'bash ./scripts/start.sh'

However, I receive the following error:

File "/usr/lib/python2.7/ssl.py", line 405, in do_handshake
    self._sslobj.do_handshake()
IOError: [Errno socket error] [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure

Probably I messed something during installation, can anyone give me an idea about how to solve this?