Trigger action via button

Remove this line 

add_action( 'wp_ajax_my_action', 'updateContent' );

Add this two Line

add_action( 'wp_ajax_nopriv_updateContent', 'updateContent' );
add_action( 'wp_ajax_updateContent', 'updateContent' );

hopefully it will solve your issue

https://codex.wordpress.org/Plugin_API/Action_Reference/wp_ajax_nopriv_(action)

Related Posts:

  1. Using Ajax with a Class file
  2. Are ‘wp_ajax’ and ‘wp_ajax_nopriv’ exclusive to authenticated and non-authenticated users?
  3. How to modify wp_ajax function?
  4. Ajax Request not coming back to class
  5. wp_ajax action is not running
  6. add_action(‘wp_ajax_[action name]’, myfunction) problem
  7. add_action and Ajax
  8. WordPress Ajax Problems
  9. Placement of add_action() for ajax callback?
  10. admin-ajax.php ” Missing argument 2″ warning
  11. Code run fast on a cronjob but slow with a do_action or ajax call
  12. WordPress ajax-action how to return content
  13. WordPress action – Pass arguments into action in an AJAX call?
  14. why does not work ajax that add_action registered in wordpress
  15. wp_ajax action is not run when ajax trigger
  16. Sharing variables in both actions wp_footer and wp_ajax
  17. Ajax callback not work
  18. admin-ajax.php calls fail if referrer is sent with 500
  19. How to run an ajax call in elementor editor
  20. do_action won’t work in ajax callback
  21. Ajax call works for logged in users and returns “Bad Request” for guests [duplicate]
  22. Its possible to ajax update the content of the admin custom post type list
  23. Why function called by admin-ajax executes synchronously?
  24. where does my function output from load-* go?
  25. Static var overwritten with WP AJAX action, works fine without AJAX
  26. add_action(‘wp_ajax_[action name]’, myfunction) problem
  27. SSL breaks customizer: page isn’t returned from ajax
  28. Stop admin-ajax?
  29. Is it safe to assume that a nonce may be validated more than once?
  30. How to verify nonce from Bulk/Quick Edit in save_post?
  31. store/cache ajax sent data to avoid repeated request
  32. wp_ajax_[service] returning 0
  33. Trying to load content of a post via AJAX
  34. Insert Post using Ajax
  35. How can I automatically login using a URL?
  36. Run again current query via ajax but changing a var
  37. Problems with creating sortable sections in customizer
  38. Quick Edit: Selected Custom Taxonomy Not Refreshing After Save
  39. Filter WP user acf field by ajax
  40. wp_verify_nonce always returns false when logged in as admin
  41. Ajax requests with different WordPress Address and Site Address setup
  42. query vars in url work but not in ajax call
  43. is_home doesn’t affect content
  44. How to declare a JS variable in an AJAX call
  45. is_page() conditional not working inside an AJAX function
  46. jQuery Ajax passing empty parameters to my function?
  47. admin-ajax.php slows down, but cant figure out which plugin
  48. Convert this relative path to absolute
  49. Load WP content with ajax less server demanding and faster than normal page loading?
  50. admin-ajax.php slow website, how to fix
  51. WP Admin AJAX Security – using POST to include a relative URL
  52. Admin-ajax.php 400 error
  53. ajax nonce verification failing
  54. Update get_pages using ajax on form select change
  55. How to create an ajax endpoint without js?
  56. get_queried_object_id in AJAX
  57. Should I check for privileges before hooking into `wp_ajax_$handle` or after?
  58. Making an ajax request from a different domain
  59. Images loading over http instead of https
  60. Ajaxify Form That Submits To Same Page To Display Post Data [closed]
  61. Pagination Using ajax
  62. wp_ajax_ works fine but wp_ajax_nopriv_ returns HTML and not calling function
  63. Why is wp_localize_script returning false?
  64. Change header.php after ajax call
  65. Submit Form data to another page via Ajax (WordPress Way)
  66. Retrieve JSON file from JS trough php
  67. WordPress – admin-ajax.php returns 502 Bad Gateway [closed]
  68. Using admin-ajax prevents regular php form submission
  69. WordPress is creating nonce as a logged in user but verifying it incorrectly
  70. Send checkbox status with Ajax / JSON and save it
  71. ajax refresh to display new posts
  72. wp ajax execution time aborted 30 sec
  73. Replace link with form to pass variables to javascript / ajax
  74. Can I use application/json content type in WordPress
  75. How to pass value from ajax to php in no conflict mode?
  76. What is the relationship between UFW (firewall) being enabled and cron job running?
  77. Hook after all metadata are set is triggering several time
  78. check_ajax_reffer not working when logged
  79. Ajax call on class returns old data
  80. how to enable ajax on submitting of contact form 7?
  81. delete post meta data in array WordPress
  82. Using AJAX on Contact-form the WordPress way
  83. Retrieve Header Background Image with AJAX
  84. Error while submitting form using AJAX and php
  85. AJAX call in backend results in empty update_option
  86. Ajax Comment: Page reloads whenever the comment submission form is reloaded
  87. How to fetch meta_value and meta_key in matrix after ajax request by post_id
  88. get_comments() returns empty array if called through AJAX
  89. register_setting and AJAX?
  90. How to get parent comment’s id?
  91. ajax response is 0 instead of ‘script’ [duplicate]
  92. A refreshless WordPress website
  93. Dynamic dependent select box getting null value
  94. get_template_part() does not render after the ajax request
  95. Add “load more” functionality to an AJAX response
  96. weird Internal Server Error – no error log produced
  97. Why are the most recent posts not appearing in a fetch request, unless I’m logged in?
  98. Successful ajax call returns lots of whitespace and text of code with 0
  99. How to submit a button automatically after every scheduled hours?
  100. At what stage does wp_ajax hooks gets applied during WordPress request?