Class Yiisoft\Yii\Event\InvalidListenerConfigurationException

                public function getName(): string
{
    return 'Invalid event listener configuration.';
}

            

                public function getSolution(): ?string
{
    return <<<SOLUTION
        Event listener has incorrect configuration. To meet EventConfigurator requirements a listener should be one of:
        - A closure.
        - [object, method] array.
        - [class name, method] array.
        - [DI container service ID, method] array.
        If you are using a classname or an alias string to be passed to a DI container please check if it is properly configured in the DI container.
    SOLUTION;
}