Bugsnag cant track exceptions

Hi
I install 1.5.0 version and add Bugsnag package to Laravel. it works fine with Laravel exceptions but Bugsnag cant track Heimdal exception. my config of optimus.heimdal.php is here
`use Symfony\Component\HttpKernel\Exception as SymfonyException;
use Optimus\Heimdal\Formatters;

return [
'add_cors_headers' => false,

'formatters' => [
SymfonyException\UnprocessableEntityHttpException::class => Formatters\UnprocessableEntityHttpExceptionFormatter::class,
SymfonyException\HttpException::class => Formatters\HttpExceptionFormatter::class,
Exception::class => Formatters\ExceptionFormatter::class,
],

'response_factory' => \Optimus\Heimdal\ResponseFactory::class,

'reporters' => [
'bugsnag' => [
'class' => \Optimus\Heimdal\Reporters\BugsnagReporter::class,
'config' => [
// config.
]
]
],

'server_error_production' => 'An error occurred.'
];
`