I am following the tutorial at http://qgis.boundlessgeo.com/static/docs/quickstart.html and I get to the step "To publish the project as it is, just select the QGIS project entry in the OpenGeo Explorer tree, and then click Publish.... You will see the following dialog:"
But 'Publish' is greyed out.
One oddity is that when I Add a Geoserver Catalogue I get a warning: Warning: Could not connect to the catalog at that URL
But I don't understand what this means. Is there something else I need to configure on GeoServer?