Help with pdf in repository

I had uploaded some pdf’s into my repository. I was able to view them earlier in the github site. However, now when I click on the link, I am seeing the message ‘Sorry, this file is invalid so it cannot be displayed.’ I can view the pdf’s by copying and pasting the URL in nbviewer. Is there a way for me to view the pdf within the github website?

Hi Anup, I’ve just visited your projects repository and I can confirm that the PDFs are working and viewable within GitHub. Perhaps you could try clearing your cache?

Thanks for the reply. The problem might be on my end. Will try clearing the cache.