Nullpointer exception when trying to install a pom extension from a Maven repository

Caused by: java.lang.NullPointerException
    at java.util.concurrent.ConcurrentHashMap.get (ConcurrentHashMap.java:936)
    at org.apache.maven.artifact.handler.manager.DefaultArtifactHandlerManager.getArtifactHandler (DefaultArtifactHandlerManager.java:46)
    at org.apache.maven.RepositoryUtils$MavenArtifactTypeRegistry.get (RepositoryUtils.java:358)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.getExtension (AetherExtensionRepository.java:624)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolveMaven (AetherExtensionRepository.java:599)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolveMaven (AetherExtensionRepository.java:536)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolveMaven (AetherExtensionRepository.java:522)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolve (AetherExtensionRepository.java:343)
    at org.xwiki.extension.repository.internal.DefaultExtensionRepositoryManager.resolve (DefaultExtensionRepositoryManager.java:331)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.resolveExtension (AbstractInstallPlanJob.java:918)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtensionDependency (AbstractInstallPlanJob.java:750)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installMandatoryExtensionDependency (AbstractInstallPlanJob.java:719)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtensionDependency (AbstractInstallPlanJob.java:574)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtensionDependencies (AbstractInstallPlanJob.java:1138)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension (AbstractInstallPlanJob.java:1058)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtensionDependency (AbstractInstallPlanJob.java:765)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installMandatoryExtensionDependency (AbstractInstallPlanJob.java:719)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtensionDependency (AbstractInstallPlanJob.java:574)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtensionDependencies (AbstractInstallPlanJob.java:1138)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension (AbstractInstallPlanJob.java:1058)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension (AbstractInstallPlanJob.java:868)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension (AbstractInstallPlanJob.java:316)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.installExtension (AbstractInstallPlanJob.java:284)
    at org.xwiki.extension.job.internal.AbstractInstallPlanJob.start (AbstractInstallPlanJob.java:215)
    at org.xwiki.extension.job.internal.InstallPlanJob.runInternal (InstallPlanJob.java:74)
    at org.xwiki.job.AbstractJob.runInContext (AbstractJob.java:246)
    at org.xwiki.job.AbstractJob.run (AbstractJob.java:223)
    at org.xwiki.tool.extension.util.ExtensionMojoHelper.resolve (ExtensionMojoHelper.java:404)
    at org.xwiki.tool.extension.util.ExtensionMojoHelper.resolveDependencies (ExtensionMojoHelper.java:421)
    at org.xwiki.tool.extension.util.ExtensionMojoHelper.storeExtensionDependencies (ExtensionMojoHelper.java:381)
    at org.xwiki.tool.extension.XIPMojo.packageExtensions (XIPMojo.java:50)
    at org.xwiki.tool.extension.XIPMojo.executeInternal (XIPMojo.java:43)
    at org.xwiki.tool.extension.util.AbstractExtensionMojo.execute (AbstractExtensionMojo.java:132)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:301)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:211)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:165)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:157)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:121)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:127)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:294)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:960)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)