Title: Error: set a valid document source
Last modified: May 12, 2024

---

# Error: set a valid document source

 *  [mistraldesign](https://wordpress.org/support/users/mistraldesign/)
 * (@mistraldesign)
 * [2 years ago](https://wordpress.org/support/topic/error-set-a-valid-document-source/)
 * the flipbook was working correctly until now (I create one flipbook per month).
   But this month I have an error message (Error: set a valid document source) which
   displays even though I have not made any changes in my source.
 * Can you help me with this?
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-set-a-valid-document-source%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [DearHive](https://wordpress.org/support/users/dearhive/)
 * (@dearhive)
 * [2 years ago](https://wordpress.org/support/topic/error-set-a-valid-document-source/#post-17752507)
 * Hi,
 * We see that the flipbook is loading. Are you still experiencing issues on your
   end?
 * Best Regards,
   DearHive
 *  Thread Starter [mistraldesign](https://wordpress.org/support/users/mistraldesign/)
 * (@mistraldesign)
 * [2 years ago](https://wordpress.org/support/topic/error-set-a-valid-document-source/#post-17754437)
 * Hi,
 * yes, I have a problem with the cache and the cdn. I use WP Rocket and Bunny cdn
   which I had to deactivate so that clients have access to the flipbook. Can you
   help me correct this problem?
 * Have a nice day

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Error: set a valid document source’ is closed to new replies.

 * ![](https://ps.w.org/3d-flipbook-dflip-lite/assets/icon-128x128.gif?rev=3175518)
 * [DearFlip - PDF Flipbook, 3D Flipbook, PDF embed, PDF viewer](https://wordpress.org/plugins/3d-flipbook-dflip-lite/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/3d-flipbook-dflip-lite/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/3d-flipbook-dflip-lite/)
 * [Active Topics](https://wordpress.org/support/plugin/3d-flipbook-dflip-lite/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/3d-flipbook-dflip-lite/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/3d-flipbook-dflip-lite/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [mistraldesign](https://wordpress.org/support/users/mistraldesign/)
 * Last activity: [2 years ago](https://wordpress.org/support/topic/error-set-a-valid-document-source/#post-17754437)
 * Status: not resolved