Hello,
My suggestion would be to try testing with Docker locally (maybe using a specific tag even) to see if you can replicate the problem.
Doing a `docker run --rm -p 8081:8081 flink:latest local` just now I am able to access the Flink dashboard as expected.
If you're deploying on Kubernetes, this would require you to either `kubectl proxy ...` or expose it by configuring the appropriate Service/Ingress/LoadBalancer in order to access the dashboard remotely.