If "Lightweight checkout" is enabled for the "Pipeline script from SCM" the build fails with the following exception -

java.lang.NullPointerException
Caused: java.io.IOException
at org.jenkinsci.plugins.p4.scm.P4SCMFileSystem$BuilderImpl.build(P4SCMFileSystem.java:95)
at jenkins.scm.api.SCMFileSystem.of(SCMFileSystem.java:197)
at jenkins.scm.api.SCMFileSystem.of(SCMFileSystem.java:173)
at org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition.create(CpsScmFlowDefinition.java:118)
at org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition.create(CpsScmFlowDefinition.java:70)
at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:310)
at hudson.model.ResourceController.execute(ResourceController.java:99)
at hudson.model.Executor.run(Executor.java:432)