Title: Javascript error
Last modified: April 14, 2025

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# Javascript error

 *  Resolved [PTPAC](https://wordpress.org/support/users/ptpac/)
 * (@ptpac)
 * [1 year, 1 month ago](https://wordpress.org/support/topic/javascript-error-239/)
 * Hi all,
   I’ve came across this JavaScript error: “Uncaught TypeError: Cannot read
   properties of undefined (reading ‘elements’)” when clicking on a custom post_type“
   event” page in an element with the class “block-post-featured-image” (FSE theme
   page). All configured in the json file as mentioned.So I’ve just updated the 
   simple-lightbox.min.js to the latest version: [https://fslightbox.com/javascript/download](https://fslightbox.com/javascript/download)
   and now the error is gone.I hope it helps someone, this is an excellent plugin!
   Best,PPR
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fjavascript-error-239%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Martin von Berg](https://wordpress.org/support/users/martinvonberg/)
 * (@martinvonberg)
 * [1 year ago](https://wordpress.org/support/topic/javascript-error-239/#post-18472341)
 * Thank you for this very helpful hint! The Plugin us up to date now.

Viewing 1 replies (of 1 total)

The topic ‘Javascript error’ is closed to new replies.

 * ![](https://ps.w.org/simple-lightbox-fslight/assets/icon.svg?rev=2715006)
 * [Simple Lightbox for WordPress](https://wordpress.org/plugins/simple-lightbox-fslight/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Martin von Berg](https://wordpress.org/support/users/martinvonberg/)
 * Last activity: [1 year ago](https://wordpress.org/support/topic/javascript-error-239/#post-18472341)
 * Status: resolved