Calling the getBuildVariables() method but got the error "hudson.remoting.ProxyException: groovy.lang.MissingMethodException:
No signature of method: org.jenkinsci.plugins.workflow.job.WorkflowRun.getBuildVariables() is applicable for argument types: () values: []"

Note that, some jobs using FreeStyleBuild while others using WorkflowRun.

I'm newly on jenkin jira, so if any wrong please correct me.

Thanks