cp-demo 5.5.1, started up from scratch using ./scripts/start.sh
Confluent Control Center:


Validate script:
➜ ./validate_connectors_running.sh
Connector wikipedia-irc is in RUNNING state
Connector replicate-topic is in RUNNING state
Connector elasticsearch-ksqldb is in RUNNING state
Suggestion
Validate script should also check task status using the .tasks[].state return of the status API