A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail.

von

You probablly pip installed something and have python prior to 2.7.9?

Well then this can happen. It is really simply solved by installing the missing dependancies. Do:

pip install --upgrade requests[security]

… or add sudo if you are not root.

Now if it tells you it is already satisfied, then you need to upgrade the dependancies by doing:

pip install --upgrade requests[security]

… or add sudo if you are not root.