I installed WP Job Manager Plugin. As part of the plug-in now I can add a Recent Jobs widget on the primary widget area but the content is not displayed properly. See image attached. See the plug-in demo page that shows properly displayed. http://demo.wpjobmanager.com I did contact the plug-in support team and they mentioned: Looks like a problem with your theme. It is not outputting widget class names https://dl.dropboxusercontent.com/s/xm44gcx4gpiu71l/2015-03-09 at 09.53 2x.png?dl=0 How can I fix it? I have the Blackbird responsive theme