Title: Unknown date type
Last modified: June 16, 2023

---

# Unknown date type

 *  Resolved [IdiAdmin](https://wordpress.org/support/users/idiadmin/)
 * (@idiadmin)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/unknown-date-type/)
 * Hi. I am experiencing an error suddenly. This shows up in my Adminpanel:
 *     ```wp-block-code
       MailPoet-fel: MailPoet\Automation\Engine\Exceptions\InvalidStateException: Unknown date type "" in /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Integrations/MailPoet/Fields/SubscriberCustomFieldsFactory.php:64Stack trace:#0 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Integrations/MailPoet/Fields/SubscriberCustomFieldsFactory.php(36): MailPoet\Automation\Integrations\MailPoet\Fields\SubscriberCustomFieldsFactory->getField()#1 [internal function]: MailPoet\Automation\Integrations\MailPoet\Fields\SubscriberCustomFieldsFactory->MailPoet\Automation\Integrations\MailPoet\Fields\{closure}()#2 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Integrations/MailPoet/Fields/SubscriberCustomFieldsFactory.php(37): array_map()#3 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Integrations/MailPoet/Fields/SubscriberFieldsFactory.php(54): MailPoet\Automation\Integrations\MailPoet\Fields\SubscriberCustomFieldsFactory->getFields()#4 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Integrations/MailPoet/Subjects/SubscriberSubject.php(65): MailPoet\Automation\Integrations\MailPoet\Fields\SubscriberFieldsFactory->getFields()#5 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Engine/Registry.php(61): MailPoet\Automation\Integrations\MailPoet\Subjects\SubscriberSubject->getFields()#6 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Integrations/MailPoet/MailPoetIntegration.php(87): MailPoet\Automation\Engine\Registry->addSubject()#7 /home/indiepri/public_html/wp-includes/class-wp-hook.php(308): MailPoet\Automation\Integrations\MailPoet\MailPoetIntegration->register()#8 /home/indiepri/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()#9 /home/indiepri/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()#10 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Engine/WordPress.php(28): do_action()#11 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Automation/Engine/Engine.php(77): MailPoet\Automation\Engine\WordPress->doAction()#12 /home/indiepri/public_html/wp-content/plugins/mailpoet/lib/Config/Initializer.php(338): MailPoet\Automation\Engine\Engine->initialize()#13 /home/indiepri/public_html/wp-includes/class-wp-hook.php(308): MailPoet\Config\Initializer->initialize()#14 /home/indiepri/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()#15 /home/indiepri/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()#16 /home/indiepri/public_html/wp-settings.php(623): do_action()#17 /home/indiepri/public_html/wp-config.php(83): require_once('/home/indiepri/...')#18 /home/indiepri/public_html/wp-load.php(50): require_once('/home/indiepri/...')#19 /home/indiepri/public_html/wp-admin/admin.php(34): require_once('/home/indiepri/...')#20 /home/indiepri/public_html/wp-admin/index.php(10): require_once('/home/indiepri/...')#21 {main}
       ```
   

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Support [Gui A. a11n](https://wordpress.org/support/users/guicmazeredo/)
 * (@guicmazeredo)
 * [2 years, 11 months ago](https://wordpress.org/support/topic/unknown-date-type/#post-16841414)
 * Hi there @idiadmi,
 * Thanks for reaching out!
 * Could you please follow the [instructions to re-install the plugin via FTP](https://kb.mailpoet.com/article/258-re-installing-updating-the-plugin-via-ftp)
   and let me know if it works?
 * Don’t worry, you won’t lose any data from the plugin.
 * If the issue persists, please send us a copy of the details from _“MailPoet >
   Help > System Status”_. Make sure to remove any personal information such as 
   your email address.
 *  Thread Starter [IdiAdmin](https://wordpress.org/support/users/idiadmin/)
 * (@idiadmin)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/unknown-date-type/#post-16848744)
 * Hi [@guicmazeredo](https://wordpress.org/support/users/guicmazeredo/)!
 * It almost worked:) I get an error that (\Cron\CronExpression) did not load. And
   to reinstall it.
 * So i can not access _“MailPoet > Help > System Status”_
 *  Plugin Support [Gui A. a11n](https://wordpress.org/support/users/guicmazeredo/)
 * (@guicmazeredo)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/unknown-date-type/#post-16852934)
 * Hey [@idiadmin](https://wordpress.org/support/users/idiadmin/) ,
 * > It almost worked:) I get an error that (\Cron\CronExpression) did not load.
   > And to reinstall it.
 * So that means the installation didn’t complete, right?
 * Could you please reach out to your host support and ask them for assistance with
   installing the plugin? If the issue persists, please ask them to provide you 
   with PHP error logs. That will hopefully give us more clues.
 * I’m looking forward to hearing from you!
 *  [Elvira K.](https://wordpress.org/support/users/treibalen/)
 * (@treibalen)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/unknown-date-type/#post-16900874)
 * Hi there [@idiadmin](https://wordpress.org/support/users/idiadmin/),
 * We haven’t heard back from you in a while, so I’m going to mark this as resolved–
   we’ll be here if and/or when you are ready to continue.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Unknown date type’ is closed to new replies.

 * ![](https://ps.w.org/mailpoet/assets/icon-256x256.png?rev=3284564)
 * [MailPoet - Newsletters, Email Marketing, and Automation](https://wordpress.org/plugins/mailpoet/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/mailpoet/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/mailpoet/)
 * [Active Topics](https://wordpress.org/support/plugin/mailpoet/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/mailpoet/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/mailpoet/reviews/)

 * 4 replies
 * 3 participants
 * Last reply from: [Elvira K.](https://wordpress.org/support/users/treibalen/)
 * Last activity: [2 years, 10 months ago](https://wordpress.org/support/topic/unknown-date-type/#post-16900874)
 * Status: resolved