DynamoDB query timeout/no response on ec2

I am using http://ift.tt/13xvB1I to connect to DynamoDB. All works fine from my local env but on ec2 it times out and sends no response when I query. Although I can connect and list tables with vogels with no problem. Additionally I tried aws-cli and it works fine.

Is there a change in API? why I can connect from my local env but not from ec2 with the same config? Update: This issue started today although no code changes on my end I just noticed there was a release today (http://ift.tt/1zq62gW)