Maven-assembly-plugin tries and fails to download xstream-1.4.5.jar

Hi,

Is there a reason why maven-assembly-plugin tries and fails to download xstream-1.4.5.jar then quietly surrenders and recommences?

[INFO] — maven-assembly-plugin:3.3.0:single (jar-with-dependencies) @ onesignal-actions —
Downloading from plugins-release: http://app.com/artifactory/plugins-release/com/thoughtworks/xstream/xstream/1.4.5/xstream-1.4.5.jar

Your URL suggests you use artifactory.

Either way though, you should contact whomever is running your repository manager instance.