Some time liferay not generate preview and not allow conversion from word to pdf etc. The reason can be it is not started with root access. Please fire below command to start soffice with the root access. First Kill the soffice proccess. pkill -9 soffice Execute below command to run it sudo soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard &