Kong Istio Integration

Hi guys, looking for help setting up Kong with Istio and getting error . I am following up Kevin’s blog to deploy the sample application but getting this error message

“GET /productpage HTTP/1.1” 502 - direct_response - “-” 0 0 0 - “172.31.76.49” “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36” “d9f5fa8c-910e-4764-9e5d-a3a59a64b613” “****.elb.us-east-1.amazonaws.com” “-” - - 10.100.135.18:9080 172.31.76.49:0 - block_all

I would really appreciate it if anybody can point me my error
thanks