FlinkUI URL Doesn't work

I am attempting to do the Week3/Streaming lab - ‘Capture Data Change with Flink & Debezium’. Currently, the links provided in the CloudFormation output work for Debezium UI ( ec2-some-IP.compute-1.amazonaws.com:8080), and PostgresEndpoint, but not for FlinkUI. The Flink URL is almost identical to the Debezium URL, with the exception for the port #, which is 8086. The instructions mention what to do if Debezium or Zeppelin UIs are down, but now for Flink. Can someone please advise how to fix?

Hello @marinaganopolsky
According to step 4.2, Flink UI won’t be available until you execute any cell that starts with the magic command %flink.ssql. Had you already done so?
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The URLs are mostly the same because all services are deployed on the same server but on different ports.

yes, that worked. thank you!