content not displayed in page using flowpaper plugin

I used flowpaper plugin to display .pdf,.jpg books in book format. I installed the plugin and followed the instructions. But the contents are not displayed. While I check it I found: “Refused to display ‘https://flowpaper.com/flipbook/?pdf=https://www.theicr.org/links/ISLAM101_2.pdf&title=&header=&theme=&thumbs=1&modified=171115506’ in a frame because it set ‘X-Frame-Options’ to ‘sameorigin’.”

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