Updating failed. The response is not a valid JSON response.

  • I just tried to post on a site I rarely use anymore, but every time I open the post editor I see at the top “Updating failed. The response is not a valid JSON response.” On top of that the options for categories, tags, and featured image are missing from the sidebar. I tried to add an image using an image block in the post but after the image is partially uploaded and visible in the bock it freezes and I see the error at the top again.

    My theme is Material Design by Google. I am running up to date versions of these plugins:

    Akismet Anti-Spam
    Comment Link Remove
    Material Design
    Matomo Analytics
    Randomrss
    Social Media and Share Icons (Ultimate Social Media)
    WP External Links
    WP Mail SMTP
    WPForms Lite
    Yoast SEO

Viewing 1 replies (of 1 total)
  • Moderator t-p

    (@t-p)

    It may be a lot of different things:
    – a plugin conflict either 1) a plugin doing something that creates output, thus breaking the response or 2) a plugin doing something with caching),
    – an overloaded server,
    – misconfigured http/https address in General Settings,
    – permalinks may need resetting,
    – theme/plugin conflict,
    – check Site Health: From your WordPress dashboard, if you go to Tools and then select Site Health, then under the Status tab on that page, WordPress will show you any improvement recommendations that could help your website. An issue related to Rest API could also cause the JSON response error on your website. Moreover, if you find any issue there, solving the issue might also fix the JSON response error for your website, etc.
    – Also review https://www.wpbeginner.com/wp-tutorials/how-to-fix-the-invalid-json-error-in-wordpress-beginners-guide/

Viewing 1 replies (of 1 total)
  • The topic ‘Updating failed. The response is not a valid JSON response.’ is closed to new replies.

Tags