Portlet temporaily unavailable message for Alfresco portlet in Liferay

Question

Hello, I followed the steps on http://www.liferay.com/web/jonas.yuan/blog/-/blogs/integrating-alfresco-web-client-as-a-set-of-portlets-with-liferay to integrate alfresco as a portlet in Liferay 5.2.3. I am able to add the Alfresco portlet to my Liferay page, but it shows the message "Portlet is temporarily unavailable"

Any way to fix this ? Thank You.