Fatal error: Declaration of Cake\ElasticSearch\Plugin::bootstrap(Cake\Core\PluginApplicationInterface $app) must be compatible with Cake\Core\BasePlugin::bootstrap(Cake\Core\PluginApplicationInterface $app): void in C:\xampp\htdocs\my_app_name\vendor\cakephp\elastic-search\src\Plugin.php on line 33
I have followed this https://book.cakephp.org/elasticsearch/2/en/index.html