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  1. ,

    401 means "Unauthorized", so there must be something with your credentials. You need to pass the authentication to let the server know its a valid user. Check whether the authentication details are provided.

Solutions on the web

via Jenkins JIRA by Daniel Beck, 1 year ago
Failed to download from http://updates.jenkins-ci.org/download/war/1.570/jenkins.war (redirected to: http://jenkins.mirror.isppower.de/war/1.570/jenkins.war)
via Jenkins JIRA by Vassilena Treneva, 2 years ago
Failed to download from http://updates.jenkins-ci.org/download/war/1.625/jenkins.war (redirected to: http://mirrors.jenkins-ci.org/war/1.625/jenkins.war)
via Jenkins JIRA by Vassilena Treneva, 1 year ago
Failed to download from http://updates.jenkins-ci.org/download/war/1.625/jenkins.war (redirected to: http://mirrors.jenkins-ci.org/war/1.625/jenkins.war)
via Jenkins JIRA by Vassilena Treneva, 1 year ago
Failed to download from http://updates.jenkins-ci.org/download/war/1.621/jenkins.war (redirected to: http://archives.jenkins-ci.org/war/1.621/jenkins.war)
via Jenkins JIRA by Daniel Beck, 2 years ago
Failed to download from http://updates.jenkins-ci.org/download/war/1.570/jenkins.war (redirected to: http://jenkins.mirror.isppower.de/war/1.570/jenkins.war)
Empty query.