Title: Cannot create new sidebar Last modified: August 22, 2016 --- # Cannot create new sidebar * Resolved [heiniekaboobler](https://wordpress.org/support/users/heiniekaboobler/) * (@heiniekaboobler) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/) * I am unable to create new sidebars. * When I click the ‘Create a new sidebar’ button on the widgets page, the dialog box comes up normally and allows me to name/describe a new sidebar. However, after clicking ‘Create sidebar,’ the new sidebar does not appear under Custom Sidebars. * I have tried using multiple themes, as well as deleting and reinstalling the plugin. I have also tried using Chrome, FireFox, and IE. * [https://wordpress.org/plugins/custom-sidebars/](https://wordpress.org/plugins/custom-sidebars/) Viewing 6 replies - 1 through 6 (of 6 total) * [David](https://wordpress.org/support/users/ugotsta/) * (@ugotsta) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242835) * Hi [@heiniekaboobler](https://wordpress.org/support/users/heiniekaboobler/), * Thanks for posting, though sorry to hear you had some trouble there. I’d love to see that sorted and haven’t been able to replicate this. * That seems to indicate a plugin or theme conflict. * Could you please either try deactivating other plugins and switching to Twenty Fourteen theme to see how it works with that? * Or try enabling debugging in WordPress? Helpful details on that here: [http://premium.wpmudev.org/blog/debugging-wordpress-how-to-use-wp_debug/](http://premium.wpmudev.org/blog/debugging-wordpress-how-to-use-wp_debug/) * That’ll help us to see if it’s indeed a conflict, in which case we could take a deeper look to see where the conflict lies. * Just to check also, after it fails to load when creating a new sidebar, can you try refreshing the page to see if the new sidebar is there? * We had an earlier report about that, though it was fixed up. This one is likely due to a conflict. * Looking forward to your reply! 🙂 * Thanks, David * [jonnyquality](https://wordpress.org/support/users/jonnyquality/) * (@jonnyquality) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242939) * I am having the same issue.It’s like I am maxed out for sidebars. Does the PRO Version give you more? * [ricula66](https://wordpress.org/support/users/ricula66/) * (@ricula66) * [11 years, 9 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242942) * I am having the same issue on 2 different themes. I have 1 custom sidebar on 1 site and 5 custom sidebars on another site * I have added no new plugins to either site since and I now have the same issue described above where after clicking ‘Create sidebar,’ the new sidebar does not appear under Custom Sidebars. * I too have tried Chrome, Firefox & IE * Debugger switched on but no message appears * Thread Starter [heiniekaboobler](https://wordpress.org/support/users/heiniekaboobler/) * (@heiniekaboobler) * [11 years, 8 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242948) * Thank you for the help. Below is the error I receive with debug turned on: * PHP Fatal error: Call to undefined function mb_strlen() in /home/***/***/***/ wp-content/plugins/custom-sidebars/inc/class-custom-sidebars-editor.php on line 188 * Along with these notices: * NOTICE: wp-content/plugins/custom-sidebars/inc/class-custom-sidebars.php:274 – Undefined index: defaults do_action(‘widgets_admin_page’), call_user_func_array, CustomSidebarsWidgets->widget_sidebar_content, include(‘/plugins/custom-sidebars/ views/widgets.php’), CustomSidebars::get_options * NOTICE: wp-content/plugins/custom-sidebars/inc/class-custom-sidebars.php:278 – Undefined index: post_type_pages do_action(‘widgets_admin_page’), call_user_func_array, CustomSidebarsWidgets->widget_sidebar_content, include(‘/plugins/custom-sidebars/ views/widgets.php’), CustomSidebars::get_options * NOTICE: wp-content/plugins/custom-sidebars/inc/class-custom-sidebars.php:282 – Undefined index: category_posts do_action(‘widgets_admin_page’), call_user_func_array, CustomSidebarsWidgets->widget_sidebar_content, include(‘/plugins/custom-sidebars/ views/widgets.php’), CustomSidebars::get_options * NOTICE: wp-content/plugins/custom-sidebars/inc/class-custom-sidebars.php:286 – Undefined index: category_pages do_action(‘widgets_admin_page’), call_user_func_array, CustomSidebarsWidgets->widget_sidebar_content, include(‘/plugins/custom-sidebars/ views/widgets.php’), CustomSidebars::get_options * Thread Starter [heiniekaboobler](https://wordpress.org/support/users/heiniekaboobler/) * (@heiniekaboobler) * [11 years, 8 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242950) * Enabling the mbstring module in my PHP configuration fixed the problem. * [Predrag – WPMU DEV Support](https://wordpress.org/support/users/wpmudev-support1/) * (@wpmudev-support1) * [11 years, 8 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242954) * Hi [@heiniekaboobler](https://wordpress.org/support/users/heiniekaboobler/), * Awesome, great to see you got that fixed. * Please advise if you have more questions. * Have a great day! * Cheers, WPMU DEV Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Cannot create new sidebar’ is closed to new replies. * ![](https://ps.w.org/custom-sidebars/assets/icon-256x256.png?rev=1414065) * [Custom Sidebars - Dynamic Sidebar Classic Widget Area Manager](https://wordpress.org/plugins/custom-sidebars/) * [Frequently Asked Questions](https://wordpress.org/plugins/custom-sidebars/#faq) * [Support Threads](https://wordpress.org/support/plugin/custom-sidebars/) * [Active Topics](https://wordpress.org/support/plugin/custom-sidebars/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/custom-sidebars/unresolved/) * [Reviews](https://wordpress.org/support/plugin/custom-sidebars/reviews/) * 6 replies * 5 participants * Last reply from: [Predrag – WPMU DEV Support](https://wordpress.org/support/users/wpmudev-support1/) * Last activity: [11 years, 8 months ago](https://wordpress.org/support/topic/cannot-create-new-sidebar/#post-5242954) * Status: resolved