Hey Lakshmanan,
I replaced it with the Facebook page ID you sent and it worked. I went to Facebook and looked at all of the settings for my page. It is set to publicly accessible. Here is a screenshot of my Facebook page settings:
https://www.mattkeithdesigns.com/downloads/ss-1.png
I can’t see anything to suggest that the page would be private. It is publicly viewable on Facebook. What am I missing?
Thanks,
Matt