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Block ACF in a post

  • Hello,

    I have created blocks that can be used in pages and different custom post types.
    However, for simple posts, it is impossible to save.
    The following error message appears: “The update failed. The response is not a valid JSON response.”

    Someone has encountered the same problem?
    What could be the cause of this?


  • I had similar. I think my issue was the WP API being blocked which seemed to cause some odd issue.

    Also worth flushing your permalinks

  • Hi!

    Thanks for your answer but I already tried this solution with permalinks, it didn’t work…
    I tried it again just in case, and unfortunately it still didn’t solve the problem.

  • Are you able to disable other plugins or try the default theme? Just to see if that helps identify the issue.

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