无法在Codeigniter 4中捕获错误

try {
    // 可能会出错的代码
} catch (\Exception $e) {
    // 处理错误的代码
}

namespace App\Exceptions;

use CodeIgniter\HTTP\Exceptions\ExceptionHandlerInterface;
use CodeIgniter\HTTP\ResponseInterface;
use Throwable;

class CustomExceptionHandler implements ExceptionHandlerInterface
{
    public function handle(Throwable $t): ResponseInterface
    {
        // 处理错误的代码
    }
}

public $handlers = [
    \App\Exceptions\CustomExceptionHandler::class,
];

use CodeIgniter\Log\Logger;

$logger = service(Logger::class);
$logger->error('An error occurred');