java.lang.RuntimeException: Failed to instantiate class org.jenkinsci.plugins.credentialsbinding.impl.BindingStep from {"stapler-class":"org.jenkinsci.plugins.credentialsbinding.impl.BindingStep","bindings":{"variable":"foo","credentialsId":["",""],"stapler-class":"org.jenkinsci.plugins.credentialsbinding.impl.StringBinding","kind":"org.jenkinsci.plugins.credentialsbinding.impl.StringBinding"}}
	at hudson.model.Descriptor.newInstance(Descriptor.java:577)
	at org.jenkinsci.plugins.workflow.cps.Snippetizer.doGenerateSnippet(Snippetizer.java:203)
	at ...
Caused by: java.lang.NullPointerException
	at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:632)
	at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:400)
	at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:684)
	at org.kohsuke.stapler.RequestImpl.access$100(RequestImpl.java:81)
	at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:587)
	at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:625)
	at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:400)
	at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:684)
	at org.kohsuke.stapler.RequestImpl.access$100(RequestImpl.java:81)
	at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:587)
	at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:400)
	at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:396)
	at hudson.model.Descriptor.newInstance(Descriptor.java:568)
	... 56 more