# Upgrade to 2.2.1 Error
**URL:** https://forum.mautic.org/t/upgrade-to-2-2-1-error/6298
**Category:** Product Support
**Created:** [October 20, 2016, 4:46pm UTC](https://forum.mautic.org/t/upgrade-to-2-2-1-error/6298 "2016-10-20T16:46:40Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@douglas](https://forum.mautic.org/u/douglas)
#### Post date: [October 20, 2016, 4:46pm UTC](https://forum.mautic.org/t/upgrade-to-2-2-1-error/6298/1 "2016-10-20T16:46:40Z")
I upgraded to 2.2.1 yesterday, and the database update failed. However, everything seems to work except for email sends receive this error:
Fatal error: Class ‘SymfonyComponentHttpKernelEventListenerValidateRequestListener’ not found in /home/rojecub8/public\_html/mautic/vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php on line 152
In my directory structure, the path SymfonyComponentHttpKernelEventListenerValidateRequestListener is actually SymfonyHttpKernelEventListenerValidateRequestListener. The component level is missing.
Guidance?
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### Author:  [@douglas](https://forum.mautic.org/u/douglas)
#### Post date: [October 20, 2016, 4:46pm UTC](https://forum.mautic.org/t/upgrade-to-2-2-1-error/6298/2 "2016-10-20T16:46:40Z")
I upgraded to 2.2.1 yesterday, and the database update failed. However, everything seems to work except for email sends receive this error:
Fatal error: Class ‘SymfonyComponentHttpKernelEventListenerValidateRequestListener’ not found in /home/rojecub8/public\_html/mautic/vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php on line 152
In my directory structure, the path SymfonyComponentHttpKernelEventListenerValidateRequestListener is actually SymfonyHttpKernelEventListenerValidateRequestListener. The component level is missing.
Guidance?
---
### Author:  [@Elenchus](https://forum.mautic.org/u/Elenchus)
#### Post date: [October 21, 2016, 9:12am UTC](https://forum.mautic.org/t/upgrade-to-2-2-1-error/6298/3 "2016-10-21T09:12:39Z")
Have a look at this guide, might help: [https://www.mautic.org/community/index.php/5856-upgrade-to-2-2-1-errors-debug-fix/p1#p16500](https://www.mautic.org/community/index.php/5856-upgrade-to-2-2-1-errors-debug-fix/p1#p16500)