Title: Source map error in preview mode
Last modified: March 6, 2025

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# Source map error in preview mode

 *  Resolved [Blamedutchie](https://wordpress.org/support/users/blamedutchie/)
 * (@blamedutchie)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/source-map-error-in-preview-mode/)
 * In post preview mode, Firefox Dev Tools show:
   Source map error: Error: request
   failed with status 404 Resource URL: /wp-content/plugins/meow-lightbox/app/lightbox.
   js?ver=1739867244 Source Map URL: lightbox.js.mapNot sure if that is expected
   behavior, if it is, feel free to close the topic.
 * Thanks.

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

 *  Plugin Support [Val Meow](https://wordpress.org/support/users/valwa/)
 * (@valwa)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/source-map-error-in-preview-mode/#post-18351572)
 * Hey [@blamedutchie](https://wordpress.org/support/users/blamedutchie/)! 👋
 * If you’re using a **third-party builder preview mode**, it’s possible that not
   all scripts are loaded as they would be when visiting the actual post—this would
   be expected.
 * If the **lightbox scripts** are not loading on the actual page, try **temporarily
   disabling** any **cache** or **optimization plugins**to see if that resolves 
   the issue.
 * Thanks! 😊
 *  Thread Starter [Blamedutchie](https://wordpress.org/support/users/blamedutchie/)
 * (@blamedutchie)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/source-map-error-in-preview-mode/#post-18351995)
 * No third-party builders on my site, thank you very much 😉
   On the actual page,
   the scripts are loading without a problem and to be honest, I don’t really use
   the lightbox when in preview mode, so I’ll ignore the error.
 * Thanks [@valwa](https://wordpress.org/support/users/valwa/) !

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

The topic ‘Source map error in preview mode’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [Blamedutchie](https://wordpress.org/support/users/blamedutchie/)
 * Last activity: [1 year, 3 months ago](https://wordpress.org/support/topic/source-map-error-in-preview-mode/#post-18351995)
 * Status: resolved