Title: Error for /wp-admin/admin.php?page=wpseo_tools&tool=file-editor Last modified: June 11, 2021 --- # Error for /wp-admin/admin.php?page=wpseo_tools&tool=file-editor * Resolved [geri777](https://wordpress.org/support/users/geri777/) * (@geri777) * [5 years ago](https://wordpress.org/support/topic/error-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor/) * I have the following problem: I have new installation of Yoast SEO from today. When I click to create a new robots.txt file see the HTML code of the backoffice form instead of the page. This is, because the response header of the page is“ text/plain” instead of “text/html”. I used Chrome, will try with other browsers now. Request: * ``` :method: POST :path: /wp-admin/admin.php?page=wpseo_tools&tool=file-editor :scheme: https accept: text/plain accept-encoding: gzip accept-language: de,en-US;q=0.9,en;q=0.8 cache-control: no-cache content-length: 143 content-type: application/x-www-form-urlencoded ``` * Response: * ``` cache-control: no-cache, must-revalidate, max-age=0 content-encoding: gzip content-length: 50870 content-type: text/plain; charset=utf-8 date: Fri, 11 Jun 2021 08:32:11 GMT expires: Wed, 11 Jan 1984 05:00:00 GMT referrer-policy: strict-origin-when-cross-origin server: Apache/2.4.41 (Ubuntu) vary: Accept-Encoding x-frame-options: SAMEORIGIN ``` - This topic was modified 5 years ago by [geri777](https://wordpress.org/support/users/geri777/). - This topic was modified 5 years ago by [geri777](https://wordpress.org/support/users/geri777/). * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 4 replies - 1 through 4 (of 4 total) * Thread Starter [geri777](https://wordpress.org/support/users/geri777/) * (@geri777) * [5 years ago](https://wordpress.org/support/topic/error-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor/#post-14544782) * Strange – using Firefox I receive the correct header (text/html) and everthing works. Firefox sends the correct “accept” header – while Chrome sends “text/plain” in that header. - This reply was modified 5 years ago by [geri777](https://wordpress.org/support/users/geri777/). - This reply was modified 5 years ago by [geri777](https://wordpress.org/support/users/geri777/). * Thread Starter [geri777](https://wordpress.org/support/users/geri777/) * (@geri777) * [5 years ago](https://wordpress.org/support/topic/error-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor/#post-14544819) * Ok, same in Firefox!! But it only occurs when creating a new robots.txt file. When I click the back button after the file has been created, everything is fine. Seems to be a bug. * [devnihil](https://wordpress.org/support/users/devnihil/) * (@devnihil) * [5 years ago](https://wordpress.org/support/topic/error-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor/#post-14547275) * We’re sorry to hear you are experiencing this issue on your site. * Can you please confirm you are using the most recent release of Yoast SEO version 16.4? You can learn more about updating here: [https://yoast.com/help/how-can-i-update-my-free-plugin/](https://yoast.com/help/how-can-i-update-my-free-plugin/) * Also, can you confirm you are using WordPress 5.7.2? You can check by clicking on the W in the top left and selecting About. If you need to update, please check with your host provider. Please know that if you are using an older version of WordPress Core you may experience unexpected behavior with Yoast. This guide explains more: [https://yoast.com/why-we-dont-support-old-wordpress-versions/](https://yoast.com/why-we-dont-support-old-wordpress-versions/) * If you update to the most current version of WordPress and Yoast SEO, does this resolve the issue? * If you have confirmed both WordPress, Yoast SEO, and all of your site’s other plugins and themes are up to date and the problem is still occurring, we would next recommend performing a conflict check. A plugin or theme conflict can sometimes cause functionality problems, errors, or unexpected behavior from the plugin. If you are unfamiliar with checking for conflicts, we have a step by step guide on how to check for conflicts available here: [How to check for plugin conflicts](https://kb.yoast.com/kb/how-to-check-for-plugin-conflicts/). * Test this on your development or staging site, if you have one. If not, we recommend using the [Health Check & Troubleshooting](https://wordpress.org/plugins/health-check/) plugin. This plugin allows you to run a conflict check **without affecting normal visitors to your site**. * Can you please confirm you have performed a complete conflict check by disabling other plugins, and resetting the theme to a default such as [TwentyTwentyOne](https://wordpress.org/themes/twentytwentyone/) and let us know the results? * If you do not feel comfortable to do this yourself or if this does not solve your issue, our [Yoast SEO Premium plugin](https://yoast.com/wordpress/plugins/seo/) comes with one year of (technical) support. * [devnihil](https://wordpress.org/support/users/devnihil/) * (@devnihil) * [4 years, 11 months ago](https://wordpress.org/support/topic/error-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor/#post-14571413) * We are going ahead and marking this issue as resolved due to inactivity. If you require any further assistance please create a new issue. Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Error for /wp-admin/admin.php?page=wpseo_tools&tool=file-editor’ is closed to new replies. * ![](https://ps.w.org/wordpress-seo/assets/icon-256x256.gif?rev=3419908) * [Yoast SEO - Advanced SEO with real-time guidance and built-in AI](https://wordpress.org/plugins/wordpress-seo/) * [Frequently Asked Questions](https://wordpress.org/plugins/wordpress-seo/#faq) * [Support Threads](https://wordpress.org/support/plugin/wordpress-seo/) * [Active Topics](https://wordpress.org/support/plugin/wordpress-seo/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wordpress-seo/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wordpress-seo/reviews/) * 4 replies * 2 participants * Last reply from: [devnihil](https://wordpress.org/support/users/devnihil/) * Last activity: [4 years, 11 months ago](https://wordpress.org/support/topic/error-for-wp-admin-admin-phppagewpseo_toolstoolfile-editor/#post-14571413) * Status: resolved