Title: Plugin keeps erroring out
Last modified: August 11, 2021

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# Plugin keeps erroring out

 *  [cwendt01](https://wordpress.org/support/users/cwendt01/)
 * (@cwendt01)
 * [4 years, 9 months ago](https://wordpress.org/support/topic/plugin-keeps-erroring-out/)
 * We can no longer get the Simple Calendar plugin to work. Have tried turning off
   all plugins, reverting back to PHP 7.3, and all other typical debug methods, 
   and nothing has worked.
 * This is the error we get on a local install of the site:
 * `Fatal error: SimpleCalendar\Events\Event_Builder::get_when(): The script tried
   to execute a method or access a property of an incomplete object. Please ensure
   that the class definition "Carbon\Carbon" of the object you are trying
   to operate on was loaded _before_ unserialize() gets called or provide an autoloader
   to load the class definition in /public/wp-content/plugins/google-calendar-events/
   includes/events/event-builder.php on line 710`
 * WordPress: 5.8
    PHP: 7.4 Simple Calendar: 3.1.36
 * Note: We also have the premium add-ons, FullCalendar and Google Calendar Pro,
   installed on the site; however this issue happens even when they’re turned off.

The topic ‘Plugin keeps erroring out’ is closed to new replies.

 * ![](https://ps.w.org/google-calendar-events/assets/icon-256x256.png?rev=1263960)
 * [Simple Calendar - Google Calendar Plugin](https://wordpress.org/plugins/google-calendar-events/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/google-calendar-events/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/google-calendar-events/)
 * [Active Topics](https://wordpress.org/support/plugin/google-calendar-events/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/google-calendar-events/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/google-calendar-events/reviews/)

## Tags

 * [simple calendar](https://wordpress.org/support/topic-tag/simple-calendar/)

 * 0 replies
 * 1 participant
 * Last reply from: [cwendt01](https://wordpress.org/support/users/cwendt01/)
 * Last activity: [4 years, 9 months ago](https://wordpress.org/support/topic/plugin-keeps-erroring-out/)
 * Status: not resolved