Title: Error occurred
Last modified: May 30, 2019

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# Error occurred

 *  [theitalianguest](https://wordpress.org/support/users/theitalianguest/)
 * (@theitalianguest)
 * [7 years ago](https://wordpress.org/support/topic/error-occurred-3/)
 * Hello,
 * I am going through some maintenance on my blog and I have a problem with this
   new plugin I downloaded. When I go to Tool > Regenerate Thumbnails > Regenerate
   Thumbnails for all the attachments I get the following error message:
    ” Unable
   to fetch a list of attachment IDs to process from the WordPress REST API. You
   can check your browser’s console for details.”
 * p.s. I don’t know if this is related or not to the problem, but I downloaded 
   another plugin that keeps the blog in maintenance mood.
 * I hope you can help me figure this out.
 * Thank you,
    Enzo.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-occurred-3%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/)
 * (@donncha)
 * [6 years, 12 months ago](https://wordpress.org/support/topic/error-occurred-3/#post-11638100)
 * Sorry for the late reply. This probably happened because your blog was in maintenance
   mode. The plugin makes requests to WordPress through the REST API to regenerate
   the thumbnails. In maintenance mode the API won’t work.

Viewing 1 replies (of 1 total)

The topic ‘Error occurred’ is closed to new replies.

 * ![](https://ps.w.org/regenerate-thumbnails/assets/icon-128x128.png?rev=1753390)
 * [Regenerate Thumbnails](https://wordpress.org/plugins/regenerate-thumbnails/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/regenerate-thumbnails/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/regenerate-thumbnails/)
 * [Active Topics](https://wordpress.org/support/plugin/regenerate-thumbnails/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/regenerate-thumbnails/unresolved/)
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 * 1 reply
 * 2 participants
 * Last reply from: [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/)
 * Last activity: [6 years, 12 months ago](https://wordpress.org/support/topic/error-occurred-3/#post-11638100)
 * Status: not resolved