# Theme Confirm Me not configured properly: builder property in the config.json

**URL:** <https://forum.mautic.org/t/theme-confirm-me-not-configured-properly-builder-property-in-the-config-json/20109>\
**Category:** Product Support\
**Tags:** mautic-4\
**Created:** [July 8, 2021, 4:01pm UTC](https://forum.mautic.org/t/theme-confirm-me-not-configured-properly-builder-property-in-the-config-json/20109 "2021-07-08T16:01:05Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![EJL](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ejl/32/12155_2.png) [@EJL](https://forum.mautic.org/u/EJL)\
**Post date:** [July 8, 2021, 4:01pm UTC](https://forum.mautic.org/t/theme-confirm-me-not-configured-properly-builder-property-in-the-config-json/20109/1 "2021-07-08T16:01:06Z")

</div>

I am troubleshooting this issue currently on 2 separate Mautic test instances. Will edit and update as troubleshooting process yields a positive result.  
**Your software**  
My Mautic version is: 4.0.0-rc  
My PHP version is: 7.4  
My Database type and version is: MariaDb 10.5.11

**Your problem**  
My problem is: After CLI update to 4.0.0-rc I get 500 error when clicking “Emails” under Channels menu

These errors are showing in the log: mautic.CRITICAL: Uncaught PHP Exception Mautic\CoreBundle\Exception\BadConfigurationException: “Theme Confirm Me not configured properly: builder property in the config.json” at /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/bundles/CoreBundle/Helper/ThemeHelper.php line 673 {“exception”:"[object] (Mautic\CoreBundle\Exception\BadConfigurationException(code: 0): Theme Confirm Me not configured properly: builder property in the config.json at /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/bundles/CoreBundle/Helper/ThemeHelper.php:673)  
[stacktrace]  
#0 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/bundles/CoreBundle/Helper/ThemeHelper.php(622): Mautic\CoreBundle\Helper\ThemeHelper-\>shouldLoadTheme()  
#1 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/bundles/CoreBundle/Helper/ThemeHelper.php(347): Mautic\CoreBundle\Helper\ThemeHelper-\>loadThemes()  
#2 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/bundles/CoreBundle/Factory/MauticFactory.php(337): Mautic\CoreBundle\Helper\ThemeHelper-\>getInstalledThemes()  
#3 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/bundles/EmailBundle/Controller/EmailController.php(115): Mautic\CoreBundle\Factory\MauticFactory-\>getInstalledThemes()  
#4 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/vendor/symfony/http-kernel/HttpKernel.php(158): Mautic\EmailBundle\Controller\EmailController-\>indexAction()  
#5 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/vendor/symfony/http-kernel/HttpKernel.php(80): Symfony\Component\HttpKernel\HttpKernel-\>handleRaw()  
#6 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/vendor/symfony/http-kernel/Kernel.php(201): Symfony\Component\HttpKernel\HttpKernel-\>handle()  
#7 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/AppKernel.php(115): Symfony\Component\HttpKernel\Kernel-\>handle()  
#8 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/middlewares/CORSMiddleware.php(91): AppKernel-\>handle()  
#9 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/middlewares/CatchExceptionMiddleware.php(43): Mautic\Middleware\CORSMiddleware-\>handle()  
#10 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/middlewares/VersionCheckMiddleware.php(67): Mautic\Middleware\CatchExceptionMiddleware-\>handle()  
#11 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/app/middlewares/TrustMiddleware.php(51): Mautic\Middleware\VersionCheckMiddleware-\>handle()  
#12 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Mautic\Middleware\TrustMiddleware-\>handle()  
#13 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/vendor/stack/run/src/Stack/run.php(13): Stack\StackedHttpKernel-\>handle()  
#14 /var/www/vhosts/Mautic-Install.com/app.Mautic-Install.com/index.php(24): Stack  
un()  
#15 {main}

Steps I have tried to fix the problem: Cleared cache, checked config.json in the listed theme. Found a format issue on line 5: **“builder”: “grapesjsbuilder”,** when it should be **“builder”: [“grapesjsbuilder”],**

Added brackets and saved config.json and the 500 error went away.