I get
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: undefined method `empty?' for hiera(): Page Hiera:Shinken is non-existent, setting defaults {}:Puppet::Util::Log at /etc/puppet/manifests/realm.pp:55 on node i-0000071b.shinken.eqiad.wmflabs
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping runOn shinken-01.