SAP HANA Academy - Live3: Java - Update HTML5 App, Deploy & Test

Hello Experts,

I was following video tutorial series for social media analytic application by Philip MUGGLESTONE . In the last video of the tutorial

SAP HANA Academy - Live3: Java - Update HTML5 App, Deploy & Test - YouTube  

which demonstrates about developing and deploying java application for  updating the Twitter stream to HANA DB, I am not able to start tracking of the tweets. After I click "Start tracking" ajax call is made as mentioned in the tutorial. The response gives the message as shown below.

Could you please let me know how to resolve this issue.

Thanks and Regards,

Ashik