Title: Debug log errors
Last modified: July 9, 2020

---

# Debug log errors

 *  Resolved [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/)
 * Hi, using the latest versions of CF7 and Conditional Fields.
 * I’m seeing a lot of warnings in the error log (when debug is on).
 * Are these intended or has there been changes that I need to update the forms?
 * Basically it’s looking for the following hidden fields that don’t exist in the
   posted data, i.e. _wpcf7cf_hidden_group_fields, _wpcf7cf_hidden_groups, _wpcf7cf_visible_groups,
   _wpcf7cf_repeaters, _wpcf7cf_steps
 *     ```
       [09-Jul-2020 05:35:35 UTC] PHP Notice:  Undefined index: _wpcf7cf_hidden_group_fields in http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php on line 250
       [09-Jul-2020 05:35:35 UTC] PHP Stack trace:
       [09-Jul-2020 05:35:35 UTC] PHP   1. {main}() http://localhost\index.php:0
       [09-Jul-2020 05:35:35 UTC] PHP   2. require() http://localhost\index.php:17
       [09-Jul-2020 05:35:35 UTC] PHP   3. wp() http://localhost\wp-blog-header.php:16
       [09-Jul-2020 05:35:35 UTC] PHP   4. WP->main() http://localhost\wp-includes\functions.php:1274
       [09-Jul-2020 05:35:35 UTC] PHP   5. WP->parse_request() http://localhost\wp-includes\class-wp.php:739
       [09-Jul-2020 05:35:35 UTC] PHP   6. do_action_ref_array() http://localhost\wp-includes\class-wp.php:388
       [09-Jul-2020 05:35:35 UTC] PHP   7. WP_Hook->do_action() http://localhost\wp-includes\plugin.php:544
       [09-Jul-2020 05:35:35 UTC] PHP   8. WP_Hook->apply_filters() http://localhost\wp-includes\class-wp-hook.php:311
       [09-Jul-2020 05:35:35 UTC] PHP   9. rest_api_loaded() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  10. WP_REST_Server->serve_request() http://localhost\wp-includes\rest-api.php:312
       [09-Jul-2020 05:35:35 UTC] PHP  11. WP_REST_Server->dispatch() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:342
       [09-Jul-2020 05:35:35 UTC] PHP  12. wpcf7_rest_create_feedback() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:1015
       [09-Jul-2020 05:35:35 UTC] PHP  13. WPCF7_ContactForm->submit() http://localhost\wp-content\plugins\contact-form-7\includes\rest-api.php:298
       [09-Jul-2020 05:35:35 UTC] PHP  14. WPCF7_Submission::get_instance() http://localhost\wp-content\plugins\contact-form-7\includes\contact-form.php:727
       [09-Jul-2020 05:35:35 UTC] PHP  15. WPCF7_Submission->proceed() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:24
       [09-Jul-2020 05:35:35 UTC] PHP  16. WPCF7_Submission->setup_posted_data() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:53
       [09-Jul-2020 05:35:35 UTC] PHP  17. apply_filters() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:279
       [09-Jul-2020 05:35:35 UTC] PHP  18. WP_Hook->apply_filters() http://localhost\wp-includes\plugin.php:206
       [09-Jul-2020 05:35:35 UTC] PHP  19. CF7CF->remove_hidden_post_data() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  20. CF7CF->set_hidden_fields_arrays() http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php:191
       [09-Jul-2020 05:35:35 UTC] PHP Notice:  Undefined index: _wpcf7cf_hidden_groups in http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php on line 259
       [09-Jul-2020 05:35:35 UTC] PHP Stack trace:
       [09-Jul-2020 05:35:35 UTC] PHP   1. {main}() http://localhost\index.php:0
       [09-Jul-2020 05:35:35 UTC] PHP   2. require() http://localhost\index.php:17
       [09-Jul-2020 05:35:35 UTC] PHP   3. wp() http://localhost\wp-blog-header.php:16
       [09-Jul-2020 05:35:35 UTC] PHP   4. WP->main() http://localhost\wp-includes\functions.php:1274
       [09-Jul-2020 05:35:35 UTC] PHP   5. WP->parse_request() http://localhost\wp-includes\class-wp.php:739
       [09-Jul-2020 05:35:35 UTC] PHP   6. do_action_ref_array() http://localhost\wp-includes\class-wp.php:388
       [09-Jul-2020 05:35:35 UTC] PHP   7. WP_Hook->do_action() http://localhost\wp-includes\plugin.php:544
       [09-Jul-2020 05:35:35 UTC] PHP   8. WP_Hook->apply_filters() http://localhost\wp-includes\class-wp-hook.php:311
       [09-Jul-2020 05:35:35 UTC] PHP   9. rest_api_loaded() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  10. WP_REST_Server->serve_request() http://localhost\wp-includes\rest-api.php:312
       [09-Jul-2020 05:35:35 UTC] PHP  11. WP_REST_Server->dispatch() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:342
       [09-Jul-2020 05:35:35 UTC] PHP  12. wpcf7_rest_create_feedback() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:1015
       [09-Jul-2020 05:35:35 UTC] PHP  13. WPCF7_ContactForm->submit() http://localhost\wp-content\plugins\contact-form-7\includes\rest-api.php:298
       [09-Jul-2020 05:35:35 UTC] PHP  14. WPCF7_Submission::get_instance() http://localhost\wp-content\plugins\contact-form-7\includes\contact-form.php:727
       [09-Jul-2020 05:35:35 UTC] PHP  15. WPCF7_Submission->proceed() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:24
       [09-Jul-2020 05:35:35 UTC] PHP  16. WPCF7_Submission->setup_posted_data() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:53
       [09-Jul-2020 05:35:35 UTC] PHP  17. apply_filters() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:279
       [09-Jul-2020 05:35:35 UTC] PHP  18. WP_Hook->apply_filters() http://localhost\wp-includes\plugin.php:206
       [09-Jul-2020 05:35:35 UTC] PHP  19. CF7CF->remove_hidden_post_data() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  20. CF7CF->set_hidden_fields_arrays() http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php:191
       [09-Jul-2020 05:35:35 UTC] PHP Notice:  Undefined index: _wpcf7cf_visible_groups in http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php on line 260
       [09-Jul-2020 05:35:35 UTC] PHP Stack trace:
       [09-Jul-2020 05:35:35 UTC] PHP   1. {main}() http://localhost\index.php:0
       [09-Jul-2020 05:35:35 UTC] PHP   2. require() http://localhost\index.php:17
       [09-Jul-2020 05:35:35 UTC] PHP   3. wp() http://localhost\wp-blog-header.php:16
       [09-Jul-2020 05:35:35 UTC] PHP   4. WP->main() http://localhost\wp-includes\functions.php:1274
       [09-Jul-2020 05:35:35 UTC] PHP   5. WP->parse_request() http://localhost\wp-includes\class-wp.php:739
       [09-Jul-2020 05:35:35 UTC] PHP   6. do_action_ref_array() http://localhost\wp-includes\class-wp.php:388
       [09-Jul-2020 05:35:35 UTC] PHP   7. WP_Hook->do_action() http://localhost\wp-includes\plugin.php:544
       [09-Jul-2020 05:35:35 UTC] PHP   8. WP_Hook->apply_filters() http://localhost\wp-includes\class-wp-hook.php:311
       [09-Jul-2020 05:35:35 UTC] PHP   9. rest_api_loaded() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  10. WP_REST_Server->serve_request() http://localhost\wp-includes\rest-api.php:312
       [09-Jul-2020 05:35:35 UTC] PHP  11. WP_REST_Server->dispatch() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:342
       [09-Jul-2020 05:35:35 UTC] PHP  12. wpcf7_rest_create_feedback() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:1015
       [09-Jul-2020 05:35:35 UTC] PHP  13. WPCF7_ContactForm->submit() http://localhost\wp-content\plugins\contact-form-7\includes\rest-api.php:298
       [09-Jul-2020 05:35:35 UTC] PHP  14. WPCF7_Submission::get_instance() http://localhost\wp-content\plugins\contact-form-7\includes\contact-form.php:727
       [09-Jul-2020 05:35:35 UTC] PHP  15. WPCF7_Submission->proceed() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:24
       [09-Jul-2020 05:35:35 UTC] PHP  16. WPCF7_Submission->setup_posted_data() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:53
       [09-Jul-2020 05:35:35 UTC] PHP  17. apply_filters() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:279
       [09-Jul-2020 05:35:35 UTC] PHP  18. WP_Hook->apply_filters() http://localhost\wp-includes\plugin.php:206
       [09-Jul-2020 05:35:35 UTC] PHP  19. CF7CF->remove_hidden_post_data() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  20. CF7CF->set_hidden_fields_arrays() http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php:191
       [09-Jul-2020 05:35:35 UTC] PHP Notice:  Undefined index: _wpcf7cf_repeaters in http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php on line 261
       [09-Jul-2020 05:35:35 UTC] PHP Stack trace:
       [09-Jul-2020 05:35:35 UTC] PHP   1. {main}() http://localhost\index.php:0
       [09-Jul-2020 05:35:35 UTC] PHP   2. require() http://localhost\index.php:17
       [09-Jul-2020 05:35:35 UTC] PHP   3. wp() http://localhost\wp-blog-header.php:16
       [09-Jul-2020 05:35:35 UTC] PHP   4. WP->main() http://localhost\wp-includes\functions.php:1274
       [09-Jul-2020 05:35:35 UTC] PHP   5. WP->parse_request() http://localhost\wp-includes\class-wp.php:739
       [09-Jul-2020 05:35:35 UTC] PHP   6. do_action_ref_array() http://localhost\wp-includes\class-wp.php:388
       [09-Jul-2020 05:35:35 UTC] PHP   7. WP_Hook->do_action() http://localhost\wp-includes\plugin.php:544
       [09-Jul-2020 05:35:35 UTC] PHP   8. WP_Hook->apply_filters() http://localhost\wp-includes\class-wp-hook.php:311
       [09-Jul-2020 05:35:35 UTC] PHP   9. rest_api_loaded() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  10. WP_REST_Server->serve_request() http://localhost\wp-includes\rest-api.php:312
       [09-Jul-2020 05:35:35 UTC] PHP  11. WP_REST_Server->dispatch() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:342
       [09-Jul-2020 05:35:35 UTC] PHP  12. wpcf7_rest_create_feedback() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:1015
       [09-Jul-2020 05:35:35 UTC] PHP  13. WPCF7_ContactForm->submit() http://localhost\wp-content\plugins\contact-form-7\includes\rest-api.php:298
       [09-Jul-2020 05:35:35 UTC] PHP  14. WPCF7_Submission::get_instance() http://localhost\wp-content\plugins\contact-form-7\includes\contact-form.php:727
       [09-Jul-2020 05:35:35 UTC] PHP  15. WPCF7_Submission->proceed() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:24
       [09-Jul-2020 05:35:35 UTC] PHP  16. WPCF7_Submission->setup_posted_data() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:53
       [09-Jul-2020 05:35:35 UTC] PHP  17. apply_filters() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:279
       [09-Jul-2020 05:35:35 UTC] PHP  18. WP_Hook->apply_filters() http://localhost\wp-includes\plugin.php:206
       [09-Jul-2020 05:35:35 UTC] PHP  19. CF7CF->remove_hidden_post_data() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  20. CF7CF->set_hidden_fields_arrays() http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php:191
       [09-Jul-2020 05:35:35 UTC] PHP Notice:  Undefined index: _wpcf7cf_steps in http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php on line 262
       [09-Jul-2020 05:35:35 UTC] PHP Stack trace:
       [09-Jul-2020 05:35:35 UTC] PHP   1. {main}() http://localhost\index.php:0
       [09-Jul-2020 05:35:35 UTC] PHP   2. require() http://localhost\index.php:17
       [09-Jul-2020 05:35:35 UTC] PHP   3. wp() http://localhost\wp-blog-header.php:16
       [09-Jul-2020 05:35:35 UTC] PHP   4. WP->main() http://localhost\wp-includes\functions.php:1274
       [09-Jul-2020 05:35:35 UTC] PHP   5. WP->parse_request() http://localhost\wp-includes\class-wp.php:739
       [09-Jul-2020 05:35:35 UTC] PHP   6. do_action_ref_array() http://localhost\wp-includes\class-wp.php:388
       [09-Jul-2020 05:35:35 UTC] PHP   7. WP_Hook->do_action() http://localhost\wp-includes\plugin.php:544
       [09-Jul-2020 05:35:35 UTC] PHP   8. WP_Hook->apply_filters() http://localhost\wp-includes\class-wp-hook.php:311
       [09-Jul-2020 05:35:35 UTC] PHP   9. rest_api_loaded() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  10. WP_REST_Server->serve_request() http://localhost\wp-includes\rest-api.php:312
       [09-Jul-2020 05:35:35 UTC] PHP  11. WP_REST_Server->dispatch() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:342
       [09-Jul-2020 05:35:35 UTC] PHP  12. wpcf7_rest_create_feedback() http://localhost\wp-includes\rest-api\class-wp-rest-server.php:1015
       [09-Jul-2020 05:35:35 UTC] PHP  13. WPCF7_ContactForm->submit() http://localhost\wp-content\plugins\contact-form-7\includes\rest-api.php:298
       [09-Jul-2020 05:35:35 UTC] PHP  14. WPCF7_Submission::get_instance() http://localhost\wp-content\plugins\contact-form-7\includes\contact-form.php:727
       [09-Jul-2020 05:35:35 UTC] PHP  15. WPCF7_Submission->proceed() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:24
       [09-Jul-2020 05:35:35 UTC] PHP  16. WPCF7_Submission->setup_posted_data() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:53
       [09-Jul-2020 05:35:35 UTC] PHP  17. apply_filters() http://localhost\wp-content\plugins\contact-form-7\includes\submission.php:279
       [09-Jul-2020 05:35:35 UTC] PHP  18. WP_Hook->apply_filters() http://localhost\wp-includes\plugin.php:206
       [09-Jul-2020 05:35:35 UTC] PHP  19. CF7CF->remove_hidden_post_data() http://localhost\wp-includes\class-wp-hook.php:287
       [09-Jul-2020 05:35:35 UTC] PHP  20. CF7CF->set_hidden_fields_arrays() http://localhost\wp-content\plugins\cf7-conditional-fields\cf7cf.php:191
       ```
   

Viewing 8 replies - 1 through 8 (of 8 total)

 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13110682)
 * There is currently a conflict with another plugin. I haven’t figured out which
   one, but as this is the second report i need to start looking into it. can you
   let me know what other cf7 extensions you have installed?
 *  Thread Starter [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13114448)
 * Thanks for confirming. I’m not running any other CF7 extensions on the site. 
   I will try disabling my plugins one by one to see if I can isolate the offending
   plugin.
 *  Thread Starter [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13114584)
 * So I’ve disabled all plugins except CF7 and CF Conditional Fields, but it’s still
   displaying the errors.
 * I even set the theme back to Twenty Twenty. Same problem.
 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13115104)
 * Interesting. I’m still having trouble to reproduce this. Could you point me to
   a page where the problem happens?
 *  Thread Starter [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13119452)
 * Unfortunately I had to disable CF7 on the site.
 * Are you testing with free version? It looks like those hidden fields are things
   that are supported in the PRO version only?
 * Is there anything else I can do to help troubleshoot?
 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [5 years, 11 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13127825)
 * That’s correct, but the fields will still be present in the free plugin, as it
   is derived from the PRO plugin. The free plugin simply disabled some features.
 * I do believe it might be related though. Someone solved the problem by adding
   some extra checks: [https://github.com/pwkip/contact-form-7-conditional-fields/pull/59/files](https://github.com/pwkip/contact-form-7-conditional-fields/pull/59/files)
 * I will look into it the first chance I get. But I’m on vacation until the 21st
   of July and got my hands full with relaxing 🙂
 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13147659)
 * I haven’t been able to reproduce this but I noticed a change in an update of 
   CF7 beginning of June that might have causes the issue. I made a small change
   in 1.9.8.
 * Can you check if it’s solved now?
 *  Thread Starter [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13148582)
 * Yes it is fixed. Thank you very much!

Viewing 8 replies - 1 through 8 (of 8 total)

The topic ‘Debug log errors’ is closed to new replies.

 * ![](https://ps.w.org/cf7-conditional-fields/assets/icon-256x256.png?rev=2072595)
 * [Conditional Fields for Contact Form 7](https://wordpress.org/plugins/cf7-conditional-fields/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/cf7-conditional-fields/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/cf7-conditional-fields/)
 * [Active Topics](https://wordpress.org/support/plugin/cf7-conditional-fields/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/cf7-conditional-fields/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/cf7-conditional-fields/reviews/)

 * 8 replies
 * 2 participants
 * Last reply from: [luminsol](https://wordpress.org/support/users/luminsol/)
 * Last activity: [5 years, 10 months ago](https://wordpress.org/support/topic/debug-log-errors-2/#post-13148582)
 * Status: resolved