After a plugin update, one of my pipelines stopped working.  It's a groovy script that kicks off packer, which uses ansible to configure an AWS system.  After a bit of pairing down, I determined that the pipeline was crashing at the withCredentials([file bit.  I stripped the code down to a simple pipeline that demonstrates the error. 

pipeline

Unknown macro: {   agent  { label 'AWS-Pipeline-Executor' }

    stages { stage('Build')

Unknown macro: {       steps{                withCredentials([file(credentialsId}

      }   
    }   
  }  
}  

The only output is:

 
[Pipeline] Start of Pipeline[Pipeline] nodeRunning on AWS-Pipeline-Executor in /home/asdc-jenkins/jenkins/workspace/.DevOps/MikeTest[Pipeline] {[Pipeline] stage[Pipeline]

[Pipeline] // stage[Pipeline] }[Pipeline] // node[Pipeline] End of Pipelinejava.lang.NullPointerException
Finished: FAILURE
 

Attached is the Jenkins log showing the error thrown.