Following exception is being thrown at the end of each Job causing the job to fail using latest email-ext plugin and Jenkins >=v1.535. Can you please look into this and fix it? Thanks a lot!

FATAL: null
java.lang.NullPointerException
at hudson.plugins.emailext.ExtendedEmailPublisher._perform(ExtendedEmailPublisher.java:243)
at hudson.plugins.emailext.ExtendedEmailPublisher.prebuild(ExtendedEmailPublisher.java:222)
at hudson.model.AbstractBuild$AbstractBuildExecution.preBuild(AbstractBuild.java:815)
at hudson.model.AbstractBuild$AbstractBuildExecution.preBuild(AbstractBuild.java:810)
at hudson.model.Build$BuildExecution.doRun(Build.java:142)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:562)
at hudson.model.Run.execute(Run.java:1665)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:246)