When i try to run GitVersion task on Bamboo the following error happen when the build start

[Hugo Marques]

System Error Details Build Adigitalbook - Moonpics - Default Job 15 : Error occurred while running Task 'Set Version(10)' of type com.carolynvs.gitversion:GitVersionTask. (java.lang.NullPointerException : )

Occurrences: 2 First Occurred: 17 Feb 2016, 2:23:54 PM Last Occurred: 17 Feb 2016, 2:31:09 PM Agent: Local Agent 2 java.lang.NullPointerException at java.lang.ProcessBuilder.start(Unknown Source) at com.atlassian.utils.process.ExternalProcessImpl.createDefaultProcess(ExternalProcessImpl.java:374) at com.atlassian.utils.process.ExternalProcessImpl.createProcess(ExternalProcessImpl.java:382) at com.atlassian.utils.process.ExternalProcessImpl.start(ExternalProcessImpl.java:336) at com.atlassian.utils.process.ExternalProcessImpl.execute(ExternalProcessImpl.java:113) at com.carolynvs.bamboo.plugin.gitversion.GitVersionTask.executeGitCommand(GitVersionTask.java:170) at com.carolynvs.bamboo.plugin.gitversion.GitVersionTask.fixDetachedHead(GitVersionTask.java:64) at com.carolynvs.bamboo.plugin.gitversion.GitVersionTask.execute(GitVersionTask.java:46) at com.atlassian.bamboo.task.TaskExecutorImpl.lambda$executeTasks$120(TaskExecutorImpl.java:269) at com.atlassian.bamboo.task.TaskExecutorImpl.executeTaskWithPrePostActions(TaskExecutorImpl.java:202) at com.atlassian.bamboo.task.TaskExecutorImpl.executeTasks(TaskExecutorImpl.java:269) at com.atlassian.bamboo.task.TaskExecutorImpl.execute(TaskExecutorImpl.java:108) at com.atlassian.bamboo.build.pipeline.tasks.ExecuteBuildTask.call(ExecuteBuildTask.java:74) at com.atlassian.bamboo.v2.build.agent.DefaultBuildAgent.build(DefaultBuildAgent.java:214) at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl$1.call(BuildAgentControllerImpl.java:139) at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl$1.call(BuildAgentControllerImpl.java:130) at com.atlassian.bamboo.variable.CustomVariableContextImpl.withVariableSubstitutor(CustomVariableContextImpl.java:215) at com.atlassian.bamboo.v2.build.agent.BuildAgentControllerImpl.waitAndPerformBuild(BuildAgentControllerImpl.java:129) at com.atlassian.bamboo.v2.build.agent.DefaultBuildAgent$1.run(DefaultBuildAgent.java:136) at com.atlassian.bamboo.utils.BambooRunnables$1.run(BambooRunnables.java:49) at com.atlassian.bamboo.security.ImpersonationHelper.runWith(ImpersonationHelper.java:31) at com.atlassian.bamboo.security.ImpersonationHelper.runWithSystemAuthority(ImpersonationHelper.java:20) at com.atlassian.bamboo.security.ImpersonationHelper$1.run(ImpersonationHelper.java:52) at java.lang.Thread.run(Unknown Source)