Your server is not configured correctly, here is the cURL error code:
* About to connect() to www.googleapis.com
port 443 (#0)
* Trying 188.8.131.52... * connected
* Connected to www.googleapis.com
(184.108.40.206) port 443 (#0)
* error setting certificate verify locations:
Please contact your hosting provider with this error code and ask them to fix it for you.