Google docs onebox gem requires a "published" document

I’m just started to try out the google docs onebox. The following link: (https://docs.google.com/spreadsheets/d/1lAuOv25IyOQgvkrTQb0ijKQhigAIeRrm2DoJUOsUiDQ/pubhtml?gid=1732160294&single=true) is puplished and are able to access through the browser or from the onebox even. But still said as you could see below; “This Sheet is Private”.

https://docs.google.com/spreadsheets/d/1lAuOv25IyOQgvkrTQb0ijKQhigAIeRrm2DoJUOsUiDQ/pubhtml?gid=1732160294&single=true