Error : “Updating failed: The response is not a valid JSON response” with custom shortcode

Problem solved, I replaced all function calls that return HTML with :

ob_start();
myFunctionDisplayHTML();  
return ob_get_clean();

And the JSON response is valid.

Thanks @phatskat, you got me on the right way 🙂
Solution find here

Related Posts:

  1. WPGut – Updating failed and shortcode?
  2. Execution limit and Memory limit errors even i changed to 1024M and 600(cache.php,load.php)?
  3. Are block templates incompatible with serialize_blocks?
  4. Gutenberg Block showing invalid content on edit
  5. How to access noticeOperations from withNotices
  6. WP Gutenberg Blocks – How to limit first/root blocks
  7. How to get boolean value from register_meta properly?
  8. wp_nonce_field displaying twice
  9. How to only load css for used blocks on frontend
  10. Invalid hook call on save, not edit when using swiper slider
  11. Proper way to use useSelect
  12. Gutenberg blocks error: Each child in a list should have a unique “key” prop
  13. Pass custom props to
  14. How can we stop showing short code in create or edit post section
  15. How do I make two shortcode use the same id and increment it when I use them multiple times?
  16. Caption Shortcode: what filter to change the image size?
  17. Gutenberg text field validation
  18. Why isn’t custom sidebar panel not showing up in the Gutenberg Editor?
  19. Remove Gutenberg Buttons Block
  20. How to include jQuery and JavaScript files correctly?
  21. How can I configure Docker for developing and deploying a custom theme?
  22. Add self-closing shortcode button to TinyMCE in WP 4.6
  23. jQuery in header or footer
  24. Adding pre-publish checks with Gutenberg
  25. How to make repeated component/block in Gutenberg
  26. How to make WordPress use non-greedy shortcode parsing?
  27. Multiple Parameters for a Shortcode
  28. Catch own Exceptions
  29. How can I fix those issues generated by the Themecheck plugin
  30. How to get data from WordPress $wpdb into React Gutenberg Blocks Frontend?
  31. Escaping built-in WP function return strings
  32. Front-End Form Submission in Shortcode
  33. Customizer Not Saving Options
  34. What’s the Right Way to get and save remote data for a Gutenberg block?
  35. What function to hook for changes made in status and visibility of a post
  36. Example of uninstaller routine to remove all custom theme options from wp_options
  37. How to disable “Transform to” option in Gutenberg custom blocks
  38. Modify a Free Plugin available on wordpress.org & include with my Premium Theme? [closed]
  39. Are we allowed to use the Allman (BSD) indent style when coding WordPress plugins and themes?
  40. How do I write a shortcode that opens and closes?
  41. Using a Shortcode to Replace Themes Stylesheet?
  42. Initial help with official “create a block” tutorial
  43. WordPress not working on localhost
  44. Creating a Link Text like Submit Button in Admin Page
  45. How do I dynamically render an InnerBlock inside a dynamic block?
  46. SQL query for custom taxonomy slugs
  47. Run code once when block is created
  48. Best way to save custom css for an block
  49. How to hook a custom user function to a wordpress core ajax action?
  50. How can I listen to events in Gutenberg block?
  51. ResizableBox with RangeControl not working
  52. Asynchronously render shortcodes in TinyMCE visual editor
  53. Shortcode returning localized HTML part
  54. Hide shortcodes “code” when using the “editor” the same as wordpress do with “gallery”
  55. Enumerating shortcode attributes in JavaScript
  56. How to Control CSS of Admin On Creating only a Specific Custom Post Type
  57. Template directory in plugin
  58. unable to wp_enqueue_script(‘suggest’);
  59. Drawing the line between theme & plugin on large scale bespoke projects
  60. Apply styles to blockquote element with the WYSIWYG editor
  61. How to add plugin options in wp editor page
  62. How to display the categories on page using shortcode?
  63. Shortcode Attributes to Return different $_POST
  64. How to use apiFetch to get author information in Gutenberg properly?
  65. Shortcode conflicts
  66. Setting global block attribute value
  67. How to display the specific post content by using POST ID
  68. How to output functions from plugin inside theme
  69. Create fixed static pages
  70. Including template in shortcodes
  71. “Rendering of admin template [path to template] failed”
  72. Custom Block Not Shown in Block Inserter
  73. Why my theme’s css not working on another site
  74. Google Web Core Vitals – management, how to in wordpress and advice
  75. How to add quick edit on the list of users to edit custom fields?
  76. Impossible to declare box-shadow with wp.customize?
  77. Override category archive page title (not the head title)
  78. By adding “?login – failed” code unable to access my dashboard
  79. How can I pass WP_Query results to a plugin?
  80. Get value of custom checkbox from Gutenberg sidebar in plugin
  81. Metabox types list
  82. 400 Bad Request and illegal invocation in wp_ajax based on processData set to false or true
  83. Rate limiting ajax requests in WordPress
  84. Some data has already been output, can’t send PDF file – fpdf issue in WordPress
  85. Dynamic sidebar areas not working on the Theme Customizer
  86. Merge Codes using redux framework
  87. Issue on Getting Images URL of the Post Gallery
  88. Best practice: What belongs in theme and what in plugin for large eCommerce website
  89. variable created in page.php is null inside of header.php
  90. Identifying a Page Containing Shortcode at `init`
  91. Updating Style From WP Options Setting Page
  92. add short code not working
  93. append code after the_content not working
  94. Problem with Poedit [closed]
  95. Shortcode attribute “title” doesn’t appear in $atts array
  96. Is Explicit Versioning a better alternative to Semantic Versioning for wordpress?
  97. Build a dynamic block using the default attributes
  98. How to display .ptm file in my WP site without JAVA
  99. How to replace content of a block in and re-render on change?
  100. extending a core block doesn’t work inside the editor
tech