EventStoreDB has disabled AtomPub since version 20, so the docker command on page 81 to run the database won’t allow access to the Stream Browser. To make it run with access to Stream Browser, there’s a need to inject the environment variable EVENTSTORE_ENABLE_ATOM_PUB_OVER_HTTP=true via Docker’s -e flag:

docker run --name esdb-node -it -p 2113:2113 -p 1113:1113 \
-e EVENTSTORE_ENABLE_ATOM_PUB_OVER_HTTP=true \
eventstore/eventstore:latest --insecure --run-projection=ALL