Sending email to many users throwing 404

I'm having this code in my function in the controller

$team->users()->each(function ($user) {
     \Mail::to($user)->send(
          new NotificationEmail($user)
     );
});

return back();

This is throwing a 404 on my screen.

if I try something like this though \Mail::to($team->users()->first()) the email is send successfully but only on the first user of course.

Any ideas what I'm doing wrong?

via Chebli Mohamed