Title: Error message Last modified: December 5, 2022 --- # Error message * Resolved [verbre](https://wordpress.org/support/users/verbre/) * (@verbre) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/) * Hello, since the latest version of Metabox (5.6.9) several of my sites are giving an error message which disturbs the display of the worpdress admin * Warning: The declaration of RWMB_Sidebar_Field::query($field) must be compatible with RWMB_Object_Choice_Field::query($meta, $field) in /home/clients/c916262d399c9e1d3018b6634561ccc0/ sites/imagieprod.com/wp-content/plugins/meta- box /inc/fields/sidebar.php at line 38 Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/error-message-970/page/2/?output_format=md) [→](https://wordpress.org/support/topic/error-message-970/page/2/?output_format=md) * Plugin Author [Anh Tran](https://wordpress.org/support/users/rilwis/) * (@rilwis) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16263861) * Thanks for your feedback. This bug is [fixed here](https://github.com/wpmetabox/meta-box/commit/037312578b7c9be597737589a98f164a057c39d9) and will be available in the new version today. * [drakking](https://wordpress.org/support/users/drakking/) * (@drakking) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16263961) * [@rilwis](https://wordpress.org/support/users/rilwis/) * Hi, * Update 5.6.10 is not compatible with Metabox AIO. * Fatal error: Declaration of MB_Comment_Meta_Box::is_edit_screen($screen = null) must be compatible with RW_Meta_Box::is_edit_screen($screen = null): bool in ************************/ wp-content/plugins/meta-box-aio/vendor/meta-box/mb-comment-meta/inc/class-mb- comment-meta-box.php on line 37 * [chiefbrody2001](https://wordpress.org/support/users/chiefbrody2001/) * (@chiefbrody2001) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264004) * Had same issue as drakking mentions above. * Plugin Author [Anh Tran](https://wordpress.org/support/users/rilwis/) * (@rilwis) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264058) * It’s fixed in the latest version. Please update. * [philbgs](https://wordpress.org/support/users/philbgs/) * (@philbgs) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264526) * Website is working fine after last update, but still receiving fatal error to access WordPress plateform. * Thread Starter [verbre](https://wordpress.org/support/users/verbre/) * (@verbre) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264593) * The version 5.6.11 have a fatal error : * `Fatal error: Uncaught TypeError: Return value of RWMB_Update_Option::get_api_key() must be of the type string, null returned in /home/clients/250d932eb38e3315e188024ff2c4dec1/ web/wp-content/plugins/meta-box/inc/update/option.php:28 Stack trace: #0 /home/ clients/250d932eb38e3315e188024ff2c4dec1/web/wp-content/plugins/meta-box/inc/ update/checker.php(135): RWMB_Update_Option->get_api_key() #1 /home/clients/250d932eb38e3315e188024ff2c4dec1/ web/wp-content/plugins/meta-box/inc/update/checker.php(83): RWMB_Update_Checker- >request('plugins') #2 /home/clients/250d932eb38e3315e188024ff2c4dec1/web/wp- includes/class-wp-hook.php(310): RWMB_Update_Checker->check_updates(Object(stdClass))# 3 /home/clients/250d932eb38e3315e188024ff2c4dec1/web/wp-includes/plugin.php(205): WP_Hook->apply_filters(Object(stdClass), Array) #4 /home/clients/250d932eb38e3315e188024ff2c4dec1/ web/wp-includes/option.php(2018): apply_filters('pre_set_site_tr...', Object( stdClass), 'update_plugins') #5 /home/clients/250d932eb38e3315e188024ff2c4dec1/ web/wp-includes/u in /home/clients/250d932eb38e3315e188024ff2c4dec1/web/wp-content/ plugins/meta-box/inc/update/option.php on line 28` * Thread Starter [verbre](https://wordpress.org/support/users/verbre/) * (@verbre) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264600) * And with php8 wordpress crash with this error * Plugin Author [Anh Tran](https://wordpress.org/support/users/rilwis/) * (@rilwis) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264666) * Hi [@verbre](https://wordpress.org/support/users/verbre/) , * Can you please try [this fix](https://github.com/wpmetabox/meta-box/commit/ec9c052b54b86c5069d0a63fc541f3310c560dc7)? * [philbgs](https://wordpress.org/support/users/philbgs/) * (@philbgs) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264716) * Same issue with the fix, Tran. * Thread Starter [verbre](https://wordpress.org/support/users/verbre/) * (@verbre) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264869) * Hi Tran Ngoc Tuan Anh * with the fix its ok (php 7.4 and php8) * ajout `, ''` line 28 * Thread Starter [verbre](https://wordpress.org/support/users/verbre/) * (@verbre) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264878) * [@philbgs](https://wordpress.org/support/users/philbgs/) * be careful, check that you have correctly entered ‘x2 and not ” because I made a mistake in my entry and correctly entered it is ok for my sites - This reply was modified 3 years, 4 months ago by [verbre](https://wordpress.org/support/users/verbre/). - This reply was modified 3 years, 4 months ago by [verbre](https://wordpress.org/support/users/verbre/). * [philbgs](https://wordpress.org/support/users/philbgs/) * (@philbgs) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264917) * Thank you Verbre, but I did a copy/paste return defined( ‘META_BOX_KEY’ ) ? META_BOX_KEY : $this->get( ‘api_key’, ” ); * .. and it’s still not working. The only way for the backend and website to work is removing the plugin. * Thread Starter [verbre](https://wordpress.org/support/users/verbre/) * (@verbre) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16264996) * [@philbgs](https://wordpress.org/support/users/philbgs/) because with a copy paste the ‘ ‘ turns into “ - This reply was modified 3 years, 4 months ago by [verbre](https://wordpress.org/support/users/verbre/). * [philbgs](https://wordpress.org/support/users/philbgs/) * (@philbgs) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16265082) * I’ve tried both of them return defined( ‘META_BOX_KEY’ ) ? META_BOX_KEY : $this- >get( ‘api_key’, ” ); return defined( ‘META_BOX_KEY’ ) ? META_BOX_KEY : $this- >get( ‘api_key’, ” ); * … same thing, same critical error. * [philbgs](https://wordpress.org/support/users/philbgs/) * (@philbgs) * [3 years, 4 months ago](https://wordpress.org/support/topic/error-message-970/#post-16265099) * I mean the second one with 2x ‘ Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/error-message-970/page/2/?output_format=md) [→](https://wordpress.org/support/topic/error-message-970/page/2/?output_format=md) The topic ‘Error message’ is closed to new replies. * ![](https://ps.w.org/meta-box/assets/icon-128x128.png?rev=1100915) * [Meta Box](https://wordpress.org/plugins/meta-box/) * [Support Threads](https://wordpress.org/support/plugin/meta-box/) * [Active Topics](https://wordpress.org/support/plugin/meta-box/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/meta-box/unresolved/) * [Reviews](https://wordpress.org/support/plugin/meta-box/reviews/) ## Tags * [warning](https://wordpress.org/support/topic-tag/warning/) * 17 replies * 6 participants * Last reply from: [Kuratorium Oświaty w Olsztynie](https://wordpress.org/support/users/koolsztyn/) * Last activity: [2 years, 11 months ago](https://wordpress.org/support/topic/error-message-970/page/2/#post-16710068) * Status: resolved