# Error after update to Mautic5

**URL:** <https://forum.mautic.org/t/error-after-update-to-mautic5/30513>\
**Category:** Mautic 5 Install/Upgrade Support\
**Created:** [January 16, 2024, 4:05am UTC](https://forum.mautic.org/t/error-after-update-to-mautic5/30513 "2024-01-16T04:05:46Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![carlosatfongo](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/carlosatfongo/32/10223_2.png) [@carlosatfongo](https://forum.mautic.org/u/carlosatfongo)\
**Post date:** [April 22, 2024, 3:00pm UTC](https://forum.mautic.org/t/error-after-update-to-mautic5/30513/10 "2024-04-22T15:00:57Z")

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I didn’t find a solution. We are going to build a new instance in 5 and manually rebuild our contacts and campaigns.

You tried this?: [4.4.10 → 5.0.1 fails because Symfony Path is not fount in ParameterLoader.php - #10 by peter\_k](https://forum.mautic.org/t/4-4-10-5-0-1-fails-because-symfony-path-is-not-fount-in-parameterloader-php/30475/10)

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