NullPointerException when building a project

When trying to build one specific project, I keep getting these exceptions:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 24.703s
[INFO] Finished at: Tue Oct 06 14:02:22 CEST 2015
[INFO] Final Memory: 30M/73M
[INFO] ------------------------------------------------------------------------
Waiting for Jenkins to finish collecting data
[ERROR] Internal error: java.lang.NullPointerException -> [Help 1]
org.apache.maven.InternalErrorException: Internal error: java.lang.NullPointerException
at org.apache.maven.lifecycle.internal.BuilderCommon.handleBuildError(BuilderCommon.java:128)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:95)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at hudson.maven.Maven3Builder.call(Maven3Builder.java:136)
at hudson.maven.Maven3Builder.call(Maven3Builder.java:71)
at hudson.remoting.UserRequest.perform(UserRequest.java:121)
at hudson.remoting.UserRequest.perform(UserRequest.java:49)
at hudson.remoting.Request$2.run(Request.java:326)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at org.jfrog.build.extractor.maven.BuildInfoRecorder.getExtension(BuildInfoRecorder.java:610)
at org.jfrog.build.extractor.maven.BuildInfoRecorder.addDependenciesToCurrentModule(BuildInfoRecorder.java:594)
at org.jfrog.build.extractor.maven.BuildInfoRecorder.addFilesToCurrentModule(BuildInfoRecorder.java:460)
at org.jfrog.build.extractor.maven.BuildInfoRecorder.finalizeAndAddModule(BuildInfoRecorder.java:446)
at org.jfrog.build.extractor.maven.BuildInfoRecorder.finalizeModule(BuildInfoRecorder.java:376)
at org.jfrog.build.extractor.maven.BuildInfoRecorder.projectSucceeded(BuildInfoRecorder.java:196)
at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire(DefaultExecutionEventCatapult.java:74)
at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire(DefaultExecutionEventCatapult.java:42)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:91)
... 27 more
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[JENKINS] Archiving /var/lib/jenkins/jobs/config-object/workspace/pom.xml to mt.com.vodafone/config-object/1.1.3-SNAPSHOT/config-object-1.1.3-SNAPSHOT.pom
[JENKINS] Archiving /var/lib/jenkins/jobs/config-object/workspace/target/config-object-1.1.3-SNAPSHOT.jar to mt.com.vodafone/config-object/1.1.3-SNAPSHOT/config-object-1.1.3-SNAPSHOT.jar
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/InternalErrorException

Version of Jenkins is 1.631, version of Artifactory is 4.1.3, version of the plugin is 2.3.1.

If I look at that getExtension method, the cause of the NPE seems pretty obvious.