               td colSpan: '5',
                 span className: 'spinner'
         else
-          if clusters && clusters.length
+          if clusters? && clusters.length
             for cluster in clusters
               React.createElement ClusterItem, cluster: cluster, key: cluster.name, kubernikusBaseUrl: kubernikusBaseUrl
 

          flashError
          error

      unless clusters && clusters.length
        div className: 'toolbar toolbar-controlcenter',
          div className: 'main-control-buttons',
            button className: "btn btn-primary", onClick: ((e) => e.preventDefault(); handleNewCluster()),

            tbody null,
              tr null,
                td colSpan: '5',
                  if error?
                    'Could not retrieve clusters'
                  else
                    'No clusters found'
