Class Yiisoft\Yii\Event\InvalidEventConfigurationFormatException

                public function getName(): string
{
    return 'Configuration format passed to EventConfigurator is invalid.';
}

            

                public function getSolution(): ?string
{
    return <<<SOLUTION
        EventConfigurator accepts an array in the following format:
            [
                'eventName1' => [\$listener1, \$listener2, ...],
                'eventName2' => [\$listener3, \$listener4, ...],
                ...
            ]
    SOLUTION;
}