Title: WordPress v5.3 Errors Last modified: November 12, 2019 --- # WordPress v5.3 Errors * Resolved [TheViv](https://wordpress.org/support/users/octotoot/) * (@octotoot) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/) * Tried to update from v5.2.4 to 5.3 on three different sites using this plugin. * Warning: Declaration of WPDI_Plugin_Installer_Skin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, …$args) in /wp-content/ plugins/classic-editor-addon/vendor/afragen/wp-dependency-installer/wp-dependency- installer.php on line 526 * Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/classic-editor-addon/vendor/afragen/wp-dependency-installer/ wp-dependency-installer.php:526) in /wp-admin/includes/misc.php on line 1252 * Warning: Cannot modify header information – headers already sent by (output started at wp-content/plugins/classic-editor-addon/vendor/afragen/wp-dependency-installer/ wp-dependency-installer.php:526) in /wp-admin/admin-header.php on line 9 Viewing 15 replies - 1 through 15 (of 15 total) * Thread Starter [TheViv](https://wordpress.org/support/users/octotoot/) * (@octotoot) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12124873) * Just verified it’s the Classic Editor Addon and not the Classic Editor which is causing the errors. I hope you can fix this. I am using version 2.5.0. * Thank you. * [webgirlie](https://wordpress.org/support/users/webgirlie/) * (@webgirlie) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12124941) * Just discovered one of my sites using Classic Editor is down – there may be many more. * I had never heard of this plugin until I logged into the cPanel to remove the Classic Editor plugin and try to get the site live again — only to find there was no way to disable it! * There was a “second” Classic Editor plugin – this one – and I did not yet know it had been injected into my site with the Update to WP 5.3 I did a few moments ago. * What a nightmare – I manage many sites and they may all be affected. * I see you are not the developers of the original plugin – I wish I had’ve known a new plugin would be added to my site which rendered a plugin of my choice turned“ off”.Please advise when a solution will be provided. * Please also advise how to now access the Classic Editor plugin which was working fantastically well until now. * [webgirlie](https://wordpress.org/support/users/webgirlie/) * (@webgirlie) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12124946) * PS – I temporarily fixed the problem by removing both plugins via cPanel, while I investigate further. * [thirstyjon](https://wordpress.org/support/users/thirstyjon/) * (@thirstyjon) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12125098) * I had the exact same problem. * My sites are hosted at Siteground. * After working through things with them, they simply rolled back PHP to 5.6 on my site and the problem was fixed. * Of course, now there was a nag on the WP Control Panel that I had an outdated version of PHP. * I upgraded to 7.1 and the problem with the Classic Editor Addon re-appeared. * So it appears that somehow upgrading to WordPress 5.3 causes the Classic Editor Addon to stop being compatible with PHP 7.1 * That is outside my level of knowledge, but I want to throw that in there to help diagnose. * For now I am just going to disable the Classic Editor Addon plugin on my sites. * But I do like having it, so I hope this is able to be fixed. * Thanks for the plugin. * [webgirlie](https://wordpress.org/support/users/webgirlie/) * (@webgirlie) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12125174) * Confirming the Classic Editor plugin is working again now I’ve deleted the “Addon” plugin via cpanel. My site is ‘live’ again and I can login. * [Steve Day](https://wordpress.org/support/users/gr-web-guy/) * (@gr-web-guy) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12127049) * To the plugin author(s) * From a developer/tech standpoint, this appears to be a change to /wp-admin/includes/ class-wp-upgrader-skin.php. The feedback function now has a spread operator as a 2nd parameter. See [https://wptavern.com/coming-in-wordpress-5-3-what-is-the-php-spread-operator](https://wptavern.com/coming-in-wordpress-5-3-what-is-the-php-spread-operator) for more info on spread operators in WP 5.3. * A possible fix is to update the WP Dependency Installer class as follows: /vendor/ afragen/wp-dependency-installer/wp-dependency-installer.php line 530 * FROM: `public function feedback( $string ) {}` * TO: `public function feedback( $string, ...$args ) {}` * I changed the code on my dev site and the warning went away. However I have not fully tested to see what the impact of this change is. * [Steve Day](https://wordpress.org/support/users/gr-web-guy/) * (@gr-web-guy) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12127058) * As a followup, it looks like this change has already been added to the WP Dependency Installer [Github repo](https://github.com/afragen/wp-dependency-installer/blob/develop/wp-dependency-installer.php) and just needs to be ported into the plugin. * [WebNut](https://wordpress.org/support/users/healthy-lawn-dude/) * (@healthy-lawn-dude) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12128715) * Same issue as above. Using Filezilla I removed the plugin ‘Classic Editor Addon’. Now able to access my site. All seems ok. * Thread Starter [TheViv](https://wordpress.org/support/users/octotoot/) * (@octotoot) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12129576) * I updated to WP v 5.3 on another site hosted elsewhere that is using PHP 7.1 and it was fine with the plugin. * The other three sites are all set at PHP 7.0. Should this be changed? * [nadinenb](https://wordpress.org/support/users/nadinenb/) * (@nadinenb) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12129858) * Same issue as the OP on my end. * Plugin Author [Pieter Bos](https://wordpress.org/support/users/senlin/) * (@senlin) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12131101) * Thanks for the reports and apologies for the inconvenience. We will roll out a new compatible version with the updated dependency installer as referred to by [@gr-web-guy](https://wordpress.org/support/users/gr-web-guy/) * [thirstyjon](https://wordpress.org/support/users/thirstyjon/) * (@thirstyjon) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12131150) * Thanks Pieter! [@senlin](https://wordpress.org/support/users/senlin/) * Let us know when that is done and I’ll go back in and turn those plugins back on in my various sites. 🙂 * I do like the plugin. * Plugin Author [Pieter Bos](https://wordpress.org/support/users/senlin/) * (@senlin) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12131217) * [@nadinenb](https://wordpress.org/support/users/nadinenb/) [@octotoot](https://wordpress.org/support/users/octotoot/) [@healthy-lawn-dude](https://wordpress.org/support/users/healthy-lawn-dude/) [@gr-web-guy](https://wordpress.org/support/users/gr-web-guy/) [@webgirlie](https://wordpress.org/support/users/webgirlie/) * We have just released version 2.6.0 which solves the issue. Thanks for reporting and for your patience and apologies for any inconvenience caused by this! * [thirstyjon](https://wordpress.org/support/users/thirstyjon/) * (@thirstyjon) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12132431) * Thank you! 🙂 * Plugin Author [Pieter Bos](https://wordpress.org/support/users/senlin/) * (@senlin) * [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12137282) * My pleasure Jon [@thirstyjon](https://wordpress.org/support/users/thirstyjon/) and glad to hear that you’re turning the plugin back on after this “debacle” 😉 Viewing 15 replies - 1 through 15 (of 15 total) The topic ‘WordPress v5.3 Errors’ is closed to new replies. * ![](https://ps.w.org/classic-editor-addon/assets/icon-256x256.png?rev=2099466) * [Classic Editor +](https://wordpress.org/plugins/classic-editor-addon/) * [Frequently Asked Questions](https://wordpress.org/plugins/classic-editor-addon/#faq) * [Support Threads](https://wordpress.org/support/plugin/classic-editor-addon/) * [Active Topics](https://wordpress.org/support/plugin/classic-editor-addon/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/classic-editor-addon/unresolved/) * [Reviews](https://wordpress.org/support/plugin/classic-editor-addon/reviews/) * 15 replies * 7 participants * Last reply from: [Pieter Bos](https://wordpress.org/support/users/senlin/) * Last activity: [6 years, 5 months ago](https://wordpress.org/support/topic/wordpress-v5-3-errors/#post-12137282) * Status: resolved