Title: 404 Error after WordPress update
Last modified: November 3, 2022

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# 404 Error after WordPress update

 *  [alimoaser](https://wordpress.org/support/users/alimoaser/)
 * (@alimoaser)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/404-error-after-wordpress-update/)
 * Hi,
    After WordPress update to 6.1 my site redirects all pages and post to 404
   Page. By examining the theme I fount the problem is about running some WordPress
   functions such as is_front_page() (by removing these functions form theme code
   the 404 error has disappeared but other functionalities of the site don’t work.
   anyone has idea? thanks in advance
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2F404-error-after-wordpress-update%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Moderator [t-p](https://wordpress.org/support/users/t-p/)
 * (@t-p)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/404-error-after-wordpress-update/#post-16161894)
 * 404 indicates failure to communicate with the server. Reasons for this failure
   to communicate with the server can vary.
    – it could be configuration issue –
   it could be memory issue – it could be permalinks issue, try reviewing this: 
   [How to fix 404 error when using Pretty Permalinks?](https://wordpress.org/support/article/faq-troubleshooting/#how-to-fix-404-error-when-using-pretty-permalinks)–
   it could be optimization issue – it could be a conflict with plugin: try [resetting the plugin folder](https://wordpress.org/support/article/faq-troubleshooting/#how-to-deactivate-all-plugins-when-not-able-to-access-the-administrative-menus);
   [https://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/](https://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/)–
   it could be a conflict with theme: try switching to the default theme for a moment
   via FTP and see if that resolves the issue. – check for [.htaccess](https://wordpress.org/support/article/htaccess/)
   file presence and check if the default wordpress mod-rewrite code is there or
   not. There are times when .htaccess file is not writable or gotten deleted – 
   Check the server error log for your hosting account for any specific error message.
   Ask your webhost for assistance to locate them
 *  Thread Starter [alimoaser](https://wordpress.org/support/users/alimoaser/)
 * (@alimoaser)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/404-error-after-wordpress-update/#post-16162189)
 * Thanks.
    The problem is about the theme but in customization mode there is no
   error. I tried some other themes and there was no error.
 *  Moderator [t-p](https://wordpress.org/support/users/t-p/)
 * (@t-p)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/404-error-after-wordpress-update/#post-16162206)
 * If theme is the error, then please report it to theme’s developers at their dedicated
   support.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘404 Error after WordPress update’ is closed to new replies.

## Tags

 * [404-error](https://wordpress.org/support/topic-tag/404-error/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 3 replies
 * 2 participants
 * Last reply from: [t-p](https://wordpress.org/support/users/t-p/)
 * Last activity: [3 years, 7 months ago](https://wordpress.org/support/topic/404-error-after-wordpress-update/#post-16162206)
 * Status: not resolved

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