Error while installing OpenEDX on Ubuntu 16.04 server

[btrish]

I was setting up Open EDX by following this documentation: https://openedx.atlassian.net/wiki/display/OpenOPS/Native+Open+edX+Ubuntu+16.04+64+bit+Installation After entering this code: wget https://raw.githubusercontent.com/edx/configuration/$OPENEDX_RELEASE/util/install/sandbox.sh -O - | bash I am getting this error:

TASK [nltk : download nltk data] *********************************************** failed: [localhost] (item={u'url': u'http://nltk.github.io/nltk_data/packages/taggers/maxent_treebank_pos_tagger.zip', u'path': u'taggers/maxent_treebank_pos_tagger'}) => {"dest": "/usr/local/share/nltk_data/maxent_treebank_pos_tagger.zip", "failed": true, "item": {"path": "taggers/maxent_treebank_pos_tagger", "url": "http://nltk.github.io/nltk_data/packages/taggers/maxent_treebank_pos_tagger.zip"}, "msg": "Request failed", "response": "Connection failure: timed out", "state": "absent", "status_code": -1, "url": "http://nltk.github.io/nltk_data/packages/taggers/maxent_treebank_pos_tagger.zip"} changed: [localhost] => (item={u'url': u'http://nltk.github.io/nltk_data/packages/corpora/stopwords.zip', u'path': u'corpora/stopwords'}) changed: [localhost] => (item={u'url': u'http://nltk.github.io/nltk_data/packages/corpora/wordnet.zip', u'path': u'corpora/wordnet'}) RUNNING HANDLER [mongo : restart mongo] **************************************** to retry, use: --limit @/var/tmp/configuration/playbooks/edx_sandbox.retry PLAY RECAP ********************************************************************* localhost : ok=146 changed=90 unreachable=0 failed=1 INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install python-software-properties if debian ---------------------------------- 290.69s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install mongo server and recommends ------------------------------------------- 247.22s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install mysql-5.6 and dependencies -------------------------------------------- 118.28s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install system packages -------------------------------------------------------- 93.30s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install rabbit package using gdebi --------------------------------------------- 80.39s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install the nginx package [0] -------------------------------------------------- 54.68s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: download nltk data ------------------------------------------------------------- 53.37s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install packages needed for single server -------------------------------------- 34.18s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Install supervisor in its venv [0] --------------------------------------------- 21.67s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Add the mongodb repo to the sources list --------------------------------------- 19.04s INFO:/var/tmp/configuration/playbooks/callback_plugins/task_timing: Playbook Configure instance(s) finished: 2017-03-24 07:20:40.357398, 269 total tasks. 0:23:20.109992 elapsed.

I am using a fresh installation of Ubuntu 16.04 server on VMware ESXi. Reinstallation isn't helping either. I double checked and I can assure that there are no problems with my internet connectivity. Any fix?