Same for me since this afternoon. HTTP response code: 504 or 503 -> servers seems to be overloaded ?
Just wait :( or try to grab the plugins files manually and put them into JENKINS_HOME/plugins, restart jenkins. Kr -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.