Fails to open ClassLoader.php file

Question

I've installed the plugin successfully, but when I go visit the CiviCRM page in the backend, I get the following error:

Warning: require_once(CRM/Core/ClassLoader.php): failed to open stream: No such file or directory in /home/capitaleventscom/public_html/wp-content/uploads/civicrm/civicrm.settings.php on line 462

Fatal error: require_once(): Failed opening required 'CRM/Core/ClassLoader.php' (include_path='.:/home/capitalevents/public_html/wp-content/plugins/civicrm/civicrm/:/home/capitalevents/public_html/wp-content/plugins/civicrm/civicrm//packages:.:/usr/local/php56/pear') in /home/capitaleventscom/public_html/wp-content/uploads/civicrm/civicrm.settings.php on line 462

I've tried but couldn't figure out anything. Any help will greatly be appreciated.

Answer 1

In the file civicrm.settings.php the variable $civicrm_root is defined. It should point to the directory where you installed the CiviCRM plugin. If it has the wrong value it causes the reported error.

Answer 2

Agreed with the @Kainuk answer. Here is what i did today to solve the same error. In your civicrm.settings.php if you have

require_once 'CRM/Core/ClassLoader.php';

Change it by adding "civicrm_root" variable

require_once $civicrm_root . '/CRM/Core/ClassLoader.php';

This is assuming that somewhere in that file, you have already set the "$civicrm_root" variable to point to your civiCRM install directory such as

$civicrm_root = '/var/www/html/drupal-root/vendor/civicrm/civicrm-core';