# ERROR 500 bei Formular ohne Rendering-Stil speichern

**URL:** <https://forum.mautic.org/t/error-500-bei-formular-ohne-rendering-stil-speichern/20916>\
**Category:** Mautic 4 Install/Upgrade Support\
**Created:** [September 17, 2021, 11:39am UTC](https://forum.mautic.org/t/error-500-bei-formular-ohne-rendering-stil-speichern/20916 "2021-09-17T11:39:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ips](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ips/32/716_2.png) [@ips](https://forum.mautic.org/u/ips)\
**Post date:** [September 17, 2021, 11:39am UTC](https://forum.mautic.org/t/error-500-bei-formular-ohne-rendering-stil-speichern/20916/1 "2021-09-17T11:39:30Z")

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**Your software** Mautic 4.0.0  
_My PHP version is_ : 7.4  
_My MySQL/MariaDB version is_ (delete as applicable): MySQL 5.7 - SSD

**Updating/Installing Errors**  
_I am_ (delete as applicable): Installing / Updating  
_Upgrading/installing via_ (delete as applicable) : Web / Command Line

_These errors are showing in the Mautic log_ :  
“Expected argument of type “null or string”, “boolean” given” at /html/mautic\_xy/vendor/symfony/form/Extension/Core/DataMapper/RadioListMapper.php line 49 {“exception”:"[object] (Symfony\Component\Form\Exception\UnexpectedTypeException(code: 0): Expected argument of type “null or string”, “boolean” given at /html/mautic\_xy/vendor/symfony/form/Extension/Core/DataMapper/RadioListMapper.php:49)"}

_My problem is_ :  
Wenn in den KOMPONENTEN \> FORMULARE im Formular die Einstellung RENDERING-Stil auf NEIN gestellt wird, dann auf SPEICHERN geht, kommt ERROR 500 (siehe Log)

 ![Unbenannt-1](https://us1.discourse-cdn.com/flex020/uploads/mautic/original/2X/4/4ee399642e2df3fd1b1855451b32ea5adb34df56.jpeg)

If in the COMPONENTS\> FORMS in the form the setting RENDERING style is set to NO, then goes to SAVE, ERROR 500 appears (see log)

_Steps I have tried to fix the problem_ :

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**Author:** ![taxi](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/taxi/32/522_2.png) [@taxi](https://forum.mautic.org/u/taxi)\
**Post date:** [October 11, 2021, 8:57am UTC](https://forum.mautic.org/t/error-500-bei-formular-ohne-rendering-stil-speichern/20916/2 "2021-10-11T08:57:45Z")

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Hallo,

gleichen Fehler habe ich auch.  
Er tritt auf wenn “Render style from Template” einmal verändert wird.  
Das Formular lässt sich danach auch nicht wieder auf zurück auf “Render style from Template” Yes setzen.

Ich verwende die neueste Version 4.0.1.

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**Author:** ![autiral](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/autiral/32/6055_2.png) [@autiral](https://forum.mautic.org/u/autiral)\
**Post date:** [October 18, 2021, 11:01am UTC](https://forum.mautic.org/t/error-500-bei-formular-ohne-rendering-stil-speichern/20916/3 "2021-10-18T11:01:41Z")

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Same problem here. Once a form is created, there is no way to make any change on it.