Jenkins fails queuing to starting agent

Branch indexing
Obtained Jenkinsfile from 10b69a5b8c8974f8cc44dd71679b602d7e0bb85b
Running in Durability level: PERFORMANCE_OPTIMIZED
[Pipeline] node
Still waiting to schedule task
???
ERROR: Issue with creating launcher for agent build-devel-21. The agent has not been fully initialized yet
[Pipeline] // node
[Pipeline] stage
[Pipeline] { (Declarative: Post Actions)
[Pipeline] sleep
Sleeping for 1 sec
[Pipeline] }
[Pipeline] // stage
[Pipeline] End of Pipeline
[Bitbucket] Notifying commit build result
[Bitbucket] Build result notified
java.lang.IllegalStateException: hudson.slaves.DumbSlave[build-devel-21] is offline
	at org.jenkinsci.plugins.workflow.support.steps.ExecutorStepExecution$PlaceholderTask$PlaceholderExecutable.run(ExecutorStepExecution.java:684)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:429)
Finished: FAILURE