>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3553834. --> Reported by: [thomasdegraaff](https://www.drupal.org/user/989866) >>> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>Install the module, and add a new search api server, for backend select Vragen.ai. When saving the error message is: Exception: Serialization of 'Closure' is not allowed in serialize() (line 14 of core/lib/Drupal/Component/Serialization/PhpSerialize.php).</p>