Title: Customize Last modified: March 14, 2017 --- # Customize * Resolved [mgb1967](https://wordpress.org/support/users/mgb1967/) * (@mgb1967) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/) * Hello. * After i upgraded my Supermag theme to the latest version, the Customizer is not working anymore! It goes to at white screen, and says, HTTP ERROR 500. * I have tried to load the Customizer from the front screen, and in the themes. The only thing i can get into related to the theme, is the Widgets. * The theme seems to be working allright besides the Customizer, but i need to do some tweaks here and there. * Hope you can help me * Michael - This topic was modified 9 years, 3 months ago by [mgb1967](https://wordpress.org/support/users/mgb1967/). - This topic was modified 9 years, 3 months ago by [mgb1967](https://wordpress.org/support/users/mgb1967/). - This topic was modified 9 years, 3 months ago by [mgb1967](https://wordpress.org/support/users/mgb1967/). Viewing 7 replies - 1 through 7 (of 7 total) * Theme Author [Acme Themes](https://wordpress.org/support/users/acmethemes/) * (@acmethemes) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8911294) * Hello mgb1967 , * Thank you for using our theme. * The error may come due to various reasons. Can you [enable debugging](https://codex.wordpress.org/WP_DEBUG) in wp-config.php file and let us know the error. `define( 'WP_DEBUG', true );` * Also please clear and disable all cache( server, plugin cache ) and check .htaccess file too. * Best Regards, Acme Themes * Thread Starter [mgb1967](https://wordpress.org/support/users/mgb1967/) * (@mgb1967) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8911479) * Hey * i Have tried the debugging, and this is what it says when i go into Customizer.. * Strict Standards: Redefining already defined constructor for class nggdb in / customers/e/a/8/gamle-dage.dk/httpd.www/blog/wp-content/plugins/nextgen-gallery/ lib/ngg-db.php on line 60 Strict Standards: Redefining already defined constructor for class nggPostThumbnail in /customers/e/a/8/gamle-dage.dk/httpd.www/blog/wp- content/plugins/nextgen-gallery/lib/post-thumbnail.php on line 26 Strict Standards: Redefining already defined constructor for class nggNavigation in /customers/ e/a/8/gamle-dage.dk/httpd.www/blog/wp-content/plugins/nextgen-gallery/lib/navigation. php on line 50 Fatal error: Call to undefined method WP_Customize_Manager::register_section_type() in /customers/e/a/8/gamle-dage.dk/httpd.www/blog/wp-content/themes/supermag/acmethemes/ customizer/customizer-pro/class-customize.php on line 68 * I have checked .htaccess and it is fine. I also cleared the cache. * Michael * Theme Author [Acme Themes](https://wordpress.org/support/users/acmethemes/) * (@acmethemes) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8911533) * Hello [@mgb1967](https://wordpress.org/support/users/mgb1967/) , * register_section_type(), was added in version 4.3.0 WordPress Core, that is causing error on Customizer. Please update your WordPress to latest version and let us know if problem solved. * We would like to recommend, always make sure that your WordPress installation( WordPress core, themes and plugins ) is up to date. * Best Regards, Acme Themes * Thread Starter [mgb1967](https://wordpress.org/support/users/mgb1967/) * (@mgb1967) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8915963) * Hello again * I would like to update my WP installation, but i do not dare, because i have the Nextgen gallery plugin installed, and i am very dependant on it. I have several thousand pictures, that rely on that plugin. The plugin is already semi broken, and if i upgrade WP, then i’m afraid that the plugin stops blank? * I could also upgrade Nextgen, but when i look at people’s comment on the plugins newer versions, then i don’t dare.. * Is there another solution to my problem with Customize, other than to upgrade? Maybee a quick fix? * Thanx * Michael - This reply was modified 9 years, 3 months ago by [mgb1967](https://wordpress.org/support/users/mgb1967/). * Theme Author [Acme Themes](https://wordpress.org/support/users/acmethemes/) * (@acmethemes) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8918384) * Hello [@mgb1967](https://wordpress.org/support/users/mgb1967/) , * Themes may be backwards compatible, but only for 3 major WordPress versions ( version 4.4 if 4.7 is latest). [see link here](https://make.wordpress.org/themes/handbook/review/required/#core-functionality-and-features). * If you are not able to update WordPress, we would like to suggest to edit a line of theme [https://themes.trac.wordpress.org/browser/supermag/1.4.1/acmethemes/customizer/customizer.php](https://themes.trac.wordpress.org/browser/supermag/1.4.1/acmethemes/customizer/customizer.php), comment/delete line number 13. We hope it will solve the issue. * **Again we would like to recommend, always make sure that your WordPress installation( WordPress core, themes and plugins ) is up to date.** * Best Regards, Acme Themes * Thread Starter [mgb1967](https://wordpress.org/support/users/mgb1967/) * (@mgb1967) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8920663) * Commenting out the line, worked beautifully!! 🙂 * Many thanx for your support, and for this fantastic theme! * Michael * Theme Author [Acme Themes](https://wordpress.org/support/users/acmethemes/) * (@acmethemes) * [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8922530) * Hello [@mgb1967](https://wordpress.org/support/users/mgb1967/) , * Very glad to know your problem solved. We wonder if you can give us review [here](https://wordpress.org/support/theme/supermag/reviews/) * Thanks, Acme Themes Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Customize’ is closed to new replies. * ![](https://i0.wp.com/themes.svn.wordpress.org/supermag/3.1.3/screenshot.jpg) * SuperMag * [Support Threads](https://wordpress.org/support/theme/supermag/) * [Active Topics](https://wordpress.org/support/theme/supermag/active/) * [Unresolved Topics](https://wordpress.org/support/theme/supermag/unresolved/) * [Reviews](https://wordpress.org/support/theme/supermag/reviews/) * 7 replies * 2 participants * Last reply from: [Acme Themes](https://wordpress.org/support/users/acmethemes/) * Last activity: [9 years, 3 months ago](https://wordpress.org/support/topic/cstomize/#post-8922530) * Status: resolved