# Error 400\_ Bad Request

**URL:** <https://forum.mautic.org/t/error-400-bad-request/26778>\
**Category:** Mautic 4 Install/Upgrade Support\
**Tags:** community, volunteer\
**Created:** [January 16, 2023, 10:29pm UTC](https://forum.mautic.org/t/error-400-bad-request/26778 "2023-01-16T22:29:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![arsene](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/arsene/32/9042_2.png) [@arsene](https://forum.mautic.org/u/arsene)\
**Post date:** [January 16, 2023, 10:29pm UTC](https://forum.mautic.org/t/error-400-bad-request/26778/1 "2023-01-16T22:29:06Z")

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**Your software** Mautic 4.4.5  
_My PHP version is_ : 7.4  
_My MySQL/MariaDB version is_ (delete as applicable): MySQL 5.7.23-23

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

_These errors are showing in the installer_ : I tried to install through composer the error displayed was: Root composer.json requires mautic/theme-trulypersonal 4.4.5 → satisfiable by mautic/theme-trulypersonal[4.4.5].  
- mautic/theme-trulypersonal 4.4.5 requires php \>=7.4.0 \<8.1 → your php version (8.1.14) does not satisfy that requirement.

I ended up installing using web.

_These errors are showing in the Mautic log_ : [16-Jan-2023 14:14:16 UTC] PHP Warning: require(/home2/lahkah2z/public\_html/var/cache/pro\_/ContainerZ0RhMhw/getSwiftmailer\_EmailSender\_ListenerService.php): failed to open stream: No such file or directory in /home2/lahkah2z/public\_html/var/cache/pro\_/ContainerZ0RhMhw/appAppKernelProdContainer.php on line 2338  
[16-Jan-2023 14:14:16 UTC] PHP Fatal error: require(): Failed opening required ‘/home2/lahkah2z/public\_html/var/cache/pro\_/ContainerZ0RhMhw/getSwiftmailer\_EmailSender\_ListenerService.php’ (include\_path=‘.:/opt/cpanel/ea-php74/root/usr/share/pear’) in /home2/lahkah2z/public\_html/var/cache/pro\_/ContainerZ0RhMhw/appAppKernelProdContainer.php on line 2338

**Your problem**  
_My problem is_ : I installed and was completing settings before I saw ERROR 400

_Steps I have tried to fix the problem_ : Tried to look at the error log/Tried to change PHP versions/

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**Author:** ![joeyk](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/joeyk/32/11164_2.png) [@joeyk](https://forum.mautic.org/u/joeyk)\
**Post date:** [January 17, 2023, 5:59am UTC](https://forum.mautic.org/t/error-400-bad-request/26778/2 "2023-01-17T05:59:38Z")

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Hi, Mautic is not php 8.1 compatible. Plz use php 7.4 or 8.0 if you must to.