Unexpected token < JSON at position 0 in advanced File Upload

  • While my users are trying to submit the form Unexpected token < JSON at position 0 error appears in advanced File Upload field and the form isn’t submitting. i don’t have a login set up in my site. is that the reason. do i need to create a login system.

    The page I need help with: [log in to see the link]

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  • I had the same problem.

    So I made research. And here what I found.

    At my website I disabled rest api one day.

    And now I have error with Caldera forms – Unexpected token < JSON at position 0. It’s because wp-json is disabled.

    So here what you must do.

    Delete plugin or code (at functions.php) that disabled rest api. Then press “Save” at Settings-Permalinks. Now form will be sent.

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