Not able to check if file exists on S3(Failed to open TCP connection to 169.254.169.254:80)

Question

We are using paperclip gem to use S3 functionality(upload, fetch, check if file present).

We are not providing AWS keys in code, we are using role-based mechanism.

Things work fine on ECS-EC2 but break on ECS fargate but both have the same role and the same attach policies.

On fargate we are getting

Failed to open TCP connection to 169.254.169.254:80 (Invalid argument - connect(2) for "169.254.169.254" port 80)

Any ideas?.