Title: Gutenberg Block Editor JSON Error
Last modified: November 6, 2020

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# Gutenberg Block Editor JSON Error

 *  Resolved [Eric Karkovack](https://wordpress.org/support/users/karks88/)
 * (@karks88)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/)
 * Hi, I’m using NextGEN Gallery on a multisite install hosted with Pantheon (NGINX).
   I’ve also created some custom Gutenberg blocks using Advanced Custom Fields.
 * There seems to be a conflict with ACF, as utilizing one of my blocks along with
   NextGEN results in the following error:
 * > Updating failed. The response is not a valid JSON response.
 * The block I built allows you to display a custom post query, where you choose
   which categories, number of posts and which layout you want to use.
 * When NextGEN is active, the error displays when I select certain categories (
   seems like the ones with the largest amount of posts). However, deactivating 
   NextGEN seems to fix the issue.
 * Are there any sort of workarounds for this? Could it be a conflict with the NextGEN
   block?

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [gabyimagely](https://wordpress.org/support/users/gabyimagely/)
 * (@gabyimagely)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/#post-13644949)
 * Hi [@karks88](https://wordpress.org/support/users/karks88/),
 * If you haven’t done this already, please, we´d like to take a closer look. Send
   us a bug report here: [http://www.imagely.com/report-bug](http://www.imagely.com/report-bug),
   refer back to this forum thread, and let them know Gaby referred you.
 * Do not forget to add the link to this forum thread.
 * Many Thanks.
 *  Thread Starter [Eric Karkovack](https://wordpress.org/support/users/karks88/)
 * (@karks88)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/#post-13645707)
 * Will do, thank you [@gabyimagely](https://wordpress.org/support/users/gabyimagely/)
 *  [gabyimagely](https://wordpress.org/support/users/gabyimagely/)
 * (@gabyimagely)
 * [5 years, 7 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/#post-13646020)
 * Thank you [@karks88](https://wordpress.org/support/users/karks88/)!
 *  [marcusjwilson](https://wordpress.org/support/users/marcusjwilson/)
 * (@marcusjwilson)
 * [5 years, 2 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/#post-14227384)
 * I can confirm this issue. When using ACF plugin to generate Gutenberg Blocks,
   and inserting those blocks into a post/page and clicking “Publish” or “Update”,
   if the NextGEN plugin is also activated, the post fails to update, and shows 
   the error:
 * “Updating failed. The response is not a valid JSON response.”
 * This is on a single WP install, rather than multisite, so could be quite a common
   issue.
 * It would be good to know if there was a resolution to this issue?
 * Thanks
    Marcus
    -  This reply was modified 5 years, 2 months ago by [marcusjwilson](https://wordpress.org/support/users/marcusjwilson/).
 *  Thread Starter [Eric Karkovack](https://wordpress.org/support/users/karks88/)
 * (@karks88)
 * [4 years, 11 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/#post-14637050)
 * [@marcusjwilson](https://wordpress.org/support/users/marcusjwilson/) This one
   is still not resolved to my knowledge. Definitely wish it would get fixed.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Gutenberg Block Editor JSON Error’ is closed to new replies.

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## Tags

 * [json](https://wordpress.org/support/topic-tag/json/)

 * 5 replies
 * 3 participants
 * Last reply from: [Eric Karkovack](https://wordpress.org/support/users/karks88/)
 * Last activity: [4 years, 11 months ago](https://wordpress.org/support/topic/gutenberg-block-editor-json-error/#post-14637050)
 * Status: resolved