Updating failed. Error message: The response is not a valid JSON response.

[swmagic999]

Is this something you guys know about?

Updating failed. Error message: The response is not a valid JSON response.

I’m only trying to change the contact-us page at https//:/chea-elks.org (if that’s relevant) and I got this when trying to save.

 

thanks

 

[scrambler]

A google search returned this

https://passionwp.com/response-is-not-a-valid-json-response-error/

and this

https://wordpress.org/support/topic/updating-failed-error-message-the-response-is-not-a-valid-json-response-2/

https://wordpress.org/support/topic/error-updating-failed-error-message-the-response-is-not-a-valid-json-response/page/2/

 

[Weaver]

I don’t have any ideas on this.

[swmagic999]

Yes Scrambler and thanks. Following their steps I just installed the classic plugin, and that fixed the issue..

[Ned]

I have also encountered “Updating failed. The response is not a valid JSON response.”

In my case, I’ve isolated the cause to the Weaver Show Posts plugin.

On a test page, I have some lines of text and inside a shortcode block, I have: [show_posts filter=test]

When I try to update the page, I get the error. When I remove the [show_posts filter=test] from the page, I can update without error.

I have set up a test site that demonstrates this behavior consistently.

I will now post a Private Reply with login credentials so you can investigate.

[Ned]

This reply has been marked as private.

[scrambler]

@weaver would have to be the one to look into this.

[Ned]

Thanks, Scrambler, I will leave the test site up as long as necessary.

[Weaver]

I can see that on your test site. I don’t know exactly what the shortcode block does, but it doesn’t make much sense that this should cause an error just when saving the test page.

I seriously suspect a bug in the shortcode block, but I will try to find time to test some more. It is really hard to test out blocks from the block editor.

[Ned]

Thanks, Weaver, the test site will be up for as much time as you need.

Today, I went into my test site and started deleting/deactivating plugins and discovered that with Gravity Forms (Version 2.5.4) deactivated, the not a valid JSON response error does not occur!

However, other shortcodes do work in the shortcode block, even with Gravity Forms (Version 2.5.4) active.

Another data point, everything worked until a few days ago. I suspect (but don’t remember exactly) the error started after I updated the Gravity Forms plugin.

Perhaps this information will help you with further troubleshooting. Thank you for your efforts so far.

[Ned]

I have verified that, with an update to Gravity Forms 2.5.5.1, the JSON error no longer occurs with the show_posts shortcode.

I will take down my test site soon.

Thank you for taking the time to investigate.

[Weaver]

Thanks for the follow up. I really didn’t know what show posts could have that would generate that error.

[elrond532000]

I to have been receiving this The response is not a valid JSON response, on pages where I have included the show_posts tag.

I have lived with the message for several years, the page updated, but the error message would appear, and when I went to edit the post, there would be a notification The backup of this post in your browser is different from the version below.

Annoying, but it worked.

I eventually found that it was the NextGen gallery plugin causing the issue.  Unfortunately, I run a multi-site WordPress system.  I am trying to understand what in the editor is being parsed by Nextgen to cause this error.

[elrond532000]

I checked the Nextgen support forum and added this to wp-config.php

define(‘NGG_DISABLE_SHORTCODE_MANAGER’, TRUE);

Seems to have solved the problem

[Author]

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