Title: PHP Fatal error: Uncaught TEC\Common\Exceptions\Not_Bound_Exception
Last modified: March 1, 2026

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# PHP Fatal error: Uncaught TEC\Common\Exceptions\Not_Bound_Exception

 *  Resolved [zwerfkatnl](https://wordpress.org/support/users/zwerfkatnl/)
 * (@zwerfkatnl)
 * [2 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-teccommonexceptionsnot_bound_exception-2/)
 * When I switch to PHP 8.3 in DirectAdmin the events page doesn’t work anymore 
   and I get the messages in apache error log as listed below. When switching back
   to PHP 7.4 everything works fine again. 
   Using latest version 6.15.17 (Required
   by: Divi Events Calendar).`[Sun Mar 01 19:57:15.723762 2026] [proxy_fcgi:error][
   pid 1441:tid 1521] [remote XX.XXX.XX.XX:37188] AH01071: Got error 'PHP message:
   PHP Fatal error: Uncaught TEC\Common\Exceptions\Not_Bound_Exception: Error while
   making tec.rest-v1.headers-base: tribe__REST__Headers__Supported::__construct():
   Argument #2 ($main) must be of type Tribe__REST__Main, Tribe__Events__REST__V1__Main
   given, called in /home/xxxx/domains/mijndomein.com/public_html/wp-content/plugins/
   the-events-calendar/src/Tribe/REST/V1/Main.php on line 142. in /home/xxxx/domains/
   mijndomein.com/public_html/wp-content/plugins/the-events-calendar/common/src/
   Common/Contracts/Container.php:35\nStack trace:\n#0 /home/xxxx/domains/mijndomein.
   com/public_html/wp-content/plugins/the-events-calendar/common/vendor/vendor-prefixed/
   lucatume/di52/src/Container.php(249): TEC\Common\Contracts\Container->get()\n#
   1 /home/xxxx/domains/mijndomein.com/public_html/wp-content/plugins/the-events-
   calendar/common/src/Tribe/Container.php(179): TEC\Common\lucatume\DI52\Container-
   >make()\n#2 /home/xxxx/domains/mijndomein…', referer: https://www.mijndomein.
   com/`

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [tristan083](https://wordpress.org/support/users/tristan083/)
 * (@tristan083)
 * [2 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-teccommonexceptionsnot_bound_exception-2/#post-18837805)
 * Hi [@zwerfkatnl](https://wordpress.org/support/users/zwerfkatnl/) ,
 * Thank you for reaching out.
 * I have not been able to reproduce this issue in my testing environment, running
   [PHP 8.3](https://go.screenpal.com/watch/cOeniQnZfDt) and just The Events Calendar
   plugin.
 * I suspect there’s a conflict that’s causing the issue here. It would be good 
   to test for conflicts. Could you follow the steps below?
    1. Deactivate all other plugins except for The Events Calendar Plugins.
    2. Switching to the[ Default theme](https://codex.wordpress.org/WordPress_Default_Themes).
 * Please read the [Testing for Conflicts](https://theeventscalendar.com/knowledgebase/k/testing-for-conflicts/)
   article before doing anything. 
 * To be safe, we’d recommend conducting tests and updates on a [Staging Server](https://theeventscalendar.com/knowledgebase/k/creating-and-using-a-wordpress-staging-site/).
   Also, please keep a working backup of your website.
 *  Plugin Support [Darian](https://wordpress.org/support/users/d0153/)
 * (@d0153)
 * [2 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-teccommonexceptionsnot_bound_exception-2/#post-18840796)
 * Hi there,
 * It looks like this thread has become inactive, so I’ll go ahead and close it 
   for now.
 * If you have any further questions or concerns, please feel free to reopen this
   thread or start a new one — we’ll be happy to help.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * ![](https://ps.w.org/the-events-calendar/assets/icon-256x256.gif?rev=2516440)
 * [The Events Calendar](https://wordpress.org/plugins/the-events-calendar/)
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 * 2 replies
 * 3 participants
 * Last reply from: [Darian](https://wordpress.org/support/users/d0153/)
 * Last activity: [2 months ago](https://wordpress.org/support/topic/php-fatal-error-uncaught-teccommonexceptionsnot_bound_exception-2/#post-18840796)
 * Status: resolved