Hi there,
welcome to Dataiku!
Looks like you are having issues with AWS Security group, which are not allowing your browser to access the VM you set up in AWS (which is the default behaviour, even if you have a public IP).
Please have a look here, we provide a quickstart AMI you can use to test DSS. You need to make sure your IP is allowed to communicate with DSS in AWS, you can find more info here.
Take care,
Omar
Architect @Dataiku
Yes Thanks.The issue is now resolved.