Clicking on Start -> Javscript Console shows error:

VM2341 build?delay=0sec:1 Refused to display 'https://jenkins.xyz.com/login?from=%2Fview%2FWeather2%2Fjob%2Fmy_fancy_job%2F%2Fbuild%3Fdelay%3D0sec' in a frame because it set 'X-Frame-Options' to 'sameorigin'.

Popup is empty afterwards. This means you cannot start any jobs in Jenkins 2.x with this plugin directly...