I am trying out quickstart tutorial for Confluent Platform 7.4.0 in AWS EC2 r5.large.
Most of the tutorial works fine until I need to do simple query using KSQL on the table and stream.
I got An unknown error has occured. Check the connection settings. I got this while running from Docker image or from the TAR archive. I have opened all the required port to my server such as 9021, 9092, 8088, 8081 - 8083.
Anybody have any idea?