# How to install Acquia's Custom Objects plugin?

**URL:** <https://forum.mautic.org/t/how-to-install-acquias-custom-objects-plugin/24204>\
**Category:** 3rd Party Addons\
**Created:** [May 24, 2022, 2:00pm UTC](https://forum.mautic.org/t/how-to-install-acquias-custom-objects-plugin/24204 "2022-05-24T14:00:10Z")\
**Posts on this page:** 1\
**Showing post:** 47

<div class="post-metadata">

**Author:** ![mikew](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/mikew/32/5156_2.png) [@mikew](https://forum.mautic.org/u/mikew)\
**Post date:** [November 23, 2022, 5:30pm UTC](https://forum.mautic.org/t/how-to-install-acquias-custom-objects-plugin/24204/47 "2022-11-23T17:30:47Z")

</div>

Tried installing this now on latest manual install of 4.4.4 and got the following error:

```auto
HP Fatal error: Uncaught Error: Interface 'Mautic\CoreBundle\Entity\UpsertInterface' not found in /var/www/ams/plugins/CustomObjectsBundle/Entity/CustomItem.php:45
Stack trace:
#0 /var/www/ams/vendor/composer/ClassLoader.php(571): include()
#1 /var/www/ams/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile()
#2 [internal function]: Composer\Autoload\ClassLoader->loadClass()
#3 [internal function]: spl_autoload_call()
#4 /var/www/ams/app/bundles/CoreBundle/DependencyInjection/Builder/Metadata/EntityMetadata.php(55): ReflectionClass->__construct()
#5 /var/www/ams/app/bundles/CoreBundle/DependencyInjection/Builder/BundleMetadataBuilder.php(164): Mautic\CoreBundle\DependencyInjection\Builder\Metadata\EntityMetadata->build()
#6 /var/www/ams/app/bundles/CoreBundle/DependencyInjection/Builder/BundleMetadataBuilder.php(158): Mautic\CoreBundle\DependencyInjection\Builder\BundleMetadataBuilder->buildMappings()
#7 /var/www/ams/app/bundles/CoreBundle/DependencyInjection/Builder/BundleMetadataBuilder.php(116): Mautic\Cor in /var/www/ams/plugins/CustomObjectsBundle/Entity/CustomItem.php on line 45

```

Any ideas?

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_[View the full topic](https://forum.mautic.org/t/how-to-install-acquias-custom-objects-plugin/24204)._