PHP Session Storage Errors

Problem

Admins cannot log in to the WHMCS Admin Area and see the following error:

PHP session storage is not writeable. For help, contact your system administrator.

This error prevents access to the Admin Area and Client Area.

Cause

This error indicates that there is a problem with the PHP session.save_path configuration or the session storage location is not writeable.

This issue often occurs when:

  • PHP configuration files contain mismatched or incorrect session storage paths. For example, you may have changed your website’s PHP version or made configuration changes but not updated all necessary PHP configuration files to match.
  • Different PHP session storage locations exist for the main directory and admin directory.
  • The configured PHP session storage path is correct but lacks write permissions.

Solution

To resolve this error, ensure that the session.save_path variable matches across all relevant PHP configuration files and that the storage location has write permissions.

For more information about configuring PHP settings, see your control panel’s documentation or contact your hosting provider or system administrator.
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Last modified: 2025 December 16