HTTP Error 403 - Forbidden in magento 1.9 google login problem

I am following this link to add google account to my magento site: https://inchoo.net/magento/social-connect-magento-extension/

I double check if I missed any configuration but none.

After connecting at the time of redirecting, it is showing 403 error.

Here is the full url to see if you can get any clue out of it: https://shop.aquaventure.in/socialconnect/google/connect/?state=78237fa277f9dc7c15c07d4eba11ee86&code=4/7QBrN0d0RsIwFOXiuGvWR0MCd5dp3GmyZ6QilPihozYQuOKUU4RCANEuQ7Hq8ZYxufCMfAcjJ7PE1nAiNrcfa6Y&scope=email%20profile%20https://www.googleapis.com/auth/userinfo.profile%20https://www.googleapis.com/auth/userinfo.email