Title: wp_update_https_detection_errors issue
Last modified: November 16, 2023

---

# wp_update_https_detection_errors issue

 *  [gilgongo](https://wordpress.org/support/users/gilgongo/)
 * (@gilgongo)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/wp_update_https_detection_errors-issue/)
 * Hi – I have a site that’s suddenly showing a fatal error message, which seems
   to be the following:
 *     ```wp-block-code
       Fatal error: Cannot redeclare wp_update_https_detection_errors() (previously declared in /home/gilgongo/html/nickyo/wp-includes/https-detection.php:104) in /home/gilgongo/html/nickyo/wp-includes/deprecated.php on line 5978
       ```
   
 * The site’s version.php says it’s 6.4.1. I think this started happening after 
   an automated update using wp-cli. I now can’t log in though.
   Does anyone know
   where to go with this? I understand the function wp_update_https_detection_errors
   issue isn’t used by themes or plugins though, so I guess it’s not that? Any URL
   called on the site seems to hit his error too.
 * Thanks for any help.
    -  This topic was modified 2 years, 4 months ago by [gilgongo](https://wordpress.org/support/users/gilgongo/).

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [Aniekan](https://wordpress.org/support/users/anieeedet/)
 * (@anieeedet)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/wp_update_https_detection_errors-issue/#post-17206865)
 * There is a conflict between two versions of the wp_update_https_detection_errors()
   function, causing a fatal error and displaying an error message. The issue is
   related to the automated update using wp-cli. Since you cannot access the WordPress
   dashboard to troubleshoot the issue, you can try resolving it using FTP or SSH.
 * Here’s how to proceed:
 * – Using your credentials, connect to your WordPress hosting server via FTP or
   SSH.
 * – Navigate to the **wp-includes folder** where the core WordPress files, including
   the deprecated.php file, are located.
 * – To disable the **deprecated.php** file temporarily, rename it to something 
   like deprecated.php.bak.
 * – Try reaccessing the WordPress dashboard. If the error message is gone, you 
   can identify the source of the conflict.
 * – If the error persists, it may be due to a plugin conflict. Deactivate all plugins
   and reactivate them individually to find the one causing the issue.
 * – Once you find the plugin causing the conflict, disable it or update it to a
   compatible version. After that, you can rename the deprecated.php file to its
   original name.
 * Another potential solution is to roll back to a previous version of WordPress
   or restore your website from a backup taken before the update.
 * Try out these, and let me know how it goes.
 *  Thread Starter [gilgongo](https://wordpress.org/support/users/gilgongo/)
 * (@gilgongo)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/wp_update_https_detection_errors-issue/#post-17207013)
 * Thanks! But renaming deprecated.php just gives this error:
 *     ```wp-block-code
       Failed opening required '/home/gilgongo/html/nickyo/wp-includes/deprecated.php
       ```
   
 * I could roll back, but that wouldn’t necessarily tell me what’s up. 
   Interestingly,
   when I try commenting out the `wp_update_https_detection_errors` function in 
   deprecated.php, I get a different “Cannot redeclare” error.
 *     ```wp-block-code
       Cannot redeclare _wp_theme_json_webfonts_handler() (previously declared in /home/gilgongo/html/nickyo/wp-includes/deprecated.php:5407)
       ```
   
 * So maybe it’s some other issue?
 *  Thread Starter [gilgongo](https://wordpress.org/support/users/gilgongo/)
 * (@gilgongo)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/wp_update_https_detection_errors-issue/#post-17208179)
 * OK I think I fixed it by rolling back to a previous version, then upgrading plugins,
   themes and then wp core. No idea what was causing the error though. WordPress
   is weird and strange. Thanks for your help though!
    -  This reply was modified 2 years, 4 months ago by [gilgongo](https://wordpress.org/support/users/gilgongo/).
 *  [Aniekan](https://wordpress.org/support/users/anieeedet/)
 * (@anieeedet)
 * [2 years, 4 months ago](https://wordpress.org/support/topic/wp_update_https_detection_errors-issue/#post-17208982)
 * I’m glad you resolved the issue by rolling back to a previous version and upgrading
   plugins, themes, and WordPress core. Great troubleshooting!

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘wp_update_https_detection_errors issue’ is closed to new replies.

## Tags

 * [deprecated](https://wordpress.org/support/topic-tag/deprecated/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 2 participants
 * Last reply from: [Aniekan](https://wordpress.org/support/users/anieeedet/)
 * Last activity: [2 years, 4 months ago](https://wordpress.org/support/topic/wp_update_https_detection_errors-issue/#post-17208982)
 * Status: not resolved

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