Error thrown during job execution when installing Demo Flavor 1.1

Error thrown during job execution

Could not find artifact org.xwiki.contrib:macro-jwplayer:xar:2.1.8 in maven-xwiki (https://nexus.xwiki.org/nexus/content/groups/public)
class org.xwiki.extension.repository.LocalExtensionRepositoryException: Failed to save extension [org.xwiki.contrib:macro-jwplayer/2.1.8] descriptor
    at org.xwiki.extension.repository.internal.local.DefaultLocalExtensionRepository.storeExtension(DefaultLocalExtensionRepository.java:187)
    at org.xwiki.extension.job.internal.InstallJob.storeExtension(InstallJob.java:186)
    at org.xwiki.extension.job.internal.InstallJob.store(InstallJob.java:171)
    at org.xwiki.extension.job.internal.InstallJob.runInternal(InstallJob.java:140)
    at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:242)
    at org.xwiki.job.AbstractJob.run(AbstractJob.java:219)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: class java.io.IOException: Failed to download file for artifact [org.xwiki.contrib:macro-jwplayer:xar:2.1.8]
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.openStream(AetherExtensionRepository.java:262)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionFile.openStream(AetherExtensionFile.java:54)
    at org.xwiki.extension.repository.internal.local.DefaultLocalExtensionRepository.storeExtension(DefaultLocalExtensionRepository.java:178)
    at org.xwiki.extension.job.internal.InstallJob.storeExtension(InstallJob.java:186)
    at org.xwiki.extension.job.internal.InstallJob.store(InstallJob.java:171)
    at org.xwiki.extension.job.internal.InstallJob.runInternal(InstallJob.java:140)
    at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:242)
    at org.xwiki.job.AbstractJob.run(AbstractJob.java:219)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: class org.eclipse.aether.transfer.ArtifactNotFoundException: Could not find artifact org.xwiki.contrib:macro-jwplayer:xar:2.1.8 in maven-xwiki (https://nexus.xwiki.org/nexus/content/groups/public)
    at org.eclipse.aether.connector.basic.ArtifactTransportListener.transferFailed(ArtifactTransportListener.java:48)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:369)
    at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:75)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:644)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:262)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.openStream(AetherExtensionRepository.java:254)
    at org.xwiki.extension.repository.aether.internal.AetherExtensionFile.openStream(AetherExtensionFile.java:54)
    at org.xwiki.extension.repository.internal.local.DefaultLocalExtensionRepository.storeExtension(DefaultLocalExtensionRepository.java:178)
    at org.xwiki.extension.job.internal.InstallJob.storeExtension(InstallJob.java:186)
    at org.xwiki.extension.job.internal.InstallJob.store(InstallJob.java:171)
    at org.xwiki.extension.job.internal.InstallJob.runInternal(InstallJob.java:140)
    at org.xwiki.job.AbstractJob.runInContext(AbstractJob.java:242)
    at org.xwiki.job.AbstractJob.run(AbstractJob.java:219)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)