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after an update of wp civicrm plugin from 5.16.4 to 5.30.1. (WordPress is also up to date). When I subscribe to an event this fatal error appear : PHP message: PHP Fatal error: Uncaught Error: Class 'CRM_Event_Cart_BAO_Conference' not found in civicrm/CRM/Event/BAO/Event.php:1133

File : "civicrm/CRM/Event/BAO/Event.php:1133"

$sessions = CRM_Event_Cart_BAO_Conference::get_participant_sessions($participantId);

Maybe the problem is due to a wrong setting ? I kept my old civicrm.settings.php as it is after update.

It seems eventcart extension is not installed or activated. I mean this extension : wp-content/plugins/civicrm/civicrm/ext/eventcart/

Do you know how install/enable it?

Thank you for you help. Nicolas

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  • Just a thought - there are other approaches available to paying for multiple events, especially if those events are part of a Series for example - just in case there is a better solution now than event cart
    – petednz - fuzion ♦
    Commented Nov 5, 2020 at 20:35

2 Answers 2

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As of this writing event cart should be enabled but hidden, and currently still relies on the setting under Administer - CiviEvent - Component Settings to switch on and off features. You can verify if the extension is enabled by running this SQL: select is_active from civicrm_extension where name='eventcart';

If it's not, in civi go to Support - Developer - api explorer v3 and choose Entity=Extension, and Action=Enable, and for the key parameter put eventcart. Then click execute at the bottom. The upgrade should have done that though. There should be a record that it did that in ConfigAndLog.

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  • There is only one extension is this table (it's my custom payment extension). Nothing else. Same result in api explorer v3.
    – Nicolas
    Commented Nov 5, 2020 at 22:29
  • Maybe can help : I can see all files of eventcart in the directory. So, I think it's installed but not enabled. Other info, it seems there are 2 different directories for extensions : in plugin core : wp-content/plugins/civicrm/civicrm/ext/ and in upload dir : wp-content/uploads/civicrm/ In 1st one, there is eventcart extension and others. In the second one, I have my custom payment extension.
    – Nicolas
    Commented Nov 6, 2020 at 9:25
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I found the solution. The reason was very simple. In my settings file located in WordPress upload files, I set : $civicrm_root = dirname(__FILE__).'/../../plugins/civicrm/civicrm/';

I change it into absolute real path : $civicrm_root = /var/www/html/mysite/html/wp-content/plugins/civicrm/civicrm/';

After that, I was able to enable the extension "eventcart" with api explorer v3. It seems the "../" is not allowed by civi in last version.

Nicolas

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