I've been testing the waters of Jenkins 2 as I'm interested in the pipeline workthrough but hit a snag.

1.

docker run -p 8080:8080 -p 50000:50000 --name jenkins2 jenkinsci/jenkins:2.8

2. Log in, create account, etc
3. Create Pipeline project
4. Configure
5. In Pipeline section, "try sample pipeline" > "Github + Maven"

Behaviour:

java.lang.AssertionError: class org.jenkinsci.plugins.workflow.steps.scm.GitStep is missing its descriptor
	at jenkins.model.Jenkins.getDescriptorOrDie(Jenkins.java:1304)

I get the same error when attempting to point to my own github repo.