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Fixing WordPress post edit errors – “not a valid JSON response”

WordPress development Nov 23, 2023 by Johnny 8 Comments

Can’t save changes to your post? I got the fixes for you these error messages:

  • “Updating failed. Error message. The response is not a valid JSON response.”
  • or “Looks like something’s gone wrong. Wait a couple seconds.”

Try these troubleshooting steps:

1. Check website address:

  • Go to Dashboard > Settings > General
  • Make sure the WordPress Address (URL) and Site Address (URL) are the same.

2. Check HTTPS status:

  • Make sure you have SSL certificates generated and that you don’t have mixed content issues.

3. Save permalinks:

  • Go to Dashboard > Settings > Permalinks.
  • Hit [SAVE] twice.

4. Regenerate .htaccess file:

  • You can restore from a backup.
  • Or make a new one, using the default. (And then go save permalinks again.)

5. Disable WAF firewalls:

  • This might be from your webhost (such as mod_security) or a security plugin.

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About Johnny

Right on the edge of WordPress development! 10+ years of WordPress design, development, hosting, speed optimization, product advisor, marketing, monetization. I do all that.

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8 Comments

  1. Mukesh Patel

    November 23, 2023 at 11:31 am

    This is the most embarrassing error I every faced

    Reply
    • Miroslav Bartík

      November 23, 2023 at 11:46 am

      But unfortunately very common..

      Reply
      • Mukesh Patel

        November 23, 2023 at 7:17 pm

        Yes

        Reply
  2. Mahesh Gohil

    December 4, 2023 at 4:12 am

    Hi , !
    I wan to my website on Powerful system what can handle tech and human both ! When you say genesis is the first choice…I try to buy it….and recently I bought bizbuddung lifetime …bundle !
    I know some coding work , but not expert ! No need complicated work on my site ! There is just content and some earning links ! Download links !
    Please suggest me…I should go with genesis based bizbuddung bundle or it’s just not make for me !
    Help me !

    Reply
  3. Mahesh Gohil

    December 4, 2023 at 4:14 am

    If you can post a review about bizbuddung theme and mai engine , it’s very helpful !
    Thanks !!

    Reply
  4. Pintu Biswas

    December 12, 2023 at 11:56 pm

    I’ve got this error message:

    “Publishing failed and invalid JSON response” upon updating or publishing posts or pages

    This happened since I’d changed the permalink type. If I revert the setting to the previous one, it works just fine.

    Reply
    • Johnny

      December 14, 2023 at 12:34 am

      So this sounds like maybe your htaccess isn’t writeable?

      Reply
  5. Ayush

    September 10, 2024 at 3:47 am

    Hi, I got this issue on my wordpress website.
    Can you tell me some other ways to fix this?
    Thanks

    Reply

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