# Error 500 when searching domain in "focus" resource

**URL:** <https://forum.mautic.org/t/error-500-when-searching-domain-in-focus-resource/26093>\
**Category:** Product Support\
**Tags:** mautic-4\
**Created:** [November 16, 2022, 5:10am UTC](https://forum.mautic.org/t/error-500-when-searching-domain-in-focus-resource/26093 "2022-11-16T05:10:48Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![mauriciomendes](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/mauriciomendes/32/6285_2.png) [@mauriciomendes](https://forum.mautic.org/u/mauriciomendes)\
**Post date:** [November 16, 2022, 5:10am UTC](https://forum.mautic.org/t/error-500-when-searching-domain-in-focus-resource/26093/1 "2022-11-16T05:10:48Z")

</div>

**My Mautic version is:** 4.4.4  
**PHP version is:** 7.4.33  
**My Database:** pdo\_mysql 5.7.23-23

Hello friends, I’m new to Mautic and when I enter a domain in the “focus” resource I am faced with error 500, does anyone have any idea how to solve it?

The log shows an error:

```auto
[2022-11-16 01:35:32] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\FatalThrowableError: "Argument 1 passed to MauticPlugin\MauticFocusBundle\Helper\IframeAvailabilityChecker::check() must be of the type string, null given, called in /home2/alter442/mautic.alternativasaudavel.com/plugins/MauticFocusBundle/Controller/AjaxController.php on line 24" at /home2/alter442/mautic.alternativasaudavel.com/plugins/MauticFocusBundle/Helper/IframeAvailabilityChecker.php line 27 {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Argument 1 passed to MauticPlugin\\MauticFocusBundle\\Helper\\IframeAvailabilityChecker::check() must be of the type string, null given, called in /home2/alter442/mautic.alternativasaudavel.com/plugins/MauticFocusBundle/Controller/AjaxController.php on line 24 at /home2/alter442/mautic.alternativasaudavel.com/plugins/MauticFocusBundle/Helper/IframeAvailabilityChecker.php:27)"} {"hostname":"br850.hostgator.com.br","pid":791578}

```

Thanks