Pass variables in mailable / markdown Laravel

I'm trying to send the collected variables of this ticket to my markdown email in Laravel.

I'm getting this error

"Trying to get property of non-object" and cannot figure out how to pass all the variables into my markdown email.

Here are the steps I'm taking:

---

Route:

Route::post('/admin', 'AdminController@emailOpenStoreTicket')->name('email-open-store');

Form to gather ticket data:

<form action="" method="POST" enctype="multipart/form-data">
@csrf

<input type="email" name="staff_email" required>
<textarea name="rec_message" required></textarea> 
<input type="hidden" name="subject" value="">
...etc
<input type="hidden" name="street" value="">
<button type="submit">Send</button>
</form>

Admin Controller:

public function emailOpenStoreTicket(Request $request)
{
$validatedData = $request->validate([
'staff_email' => 'required|email',
'rec_message' => 'required|min:2'
]);
$ticket = new EmailOpenTicket;
$ticket->staff_email=$request->staff_email;
$ticket->rec_message=$request->rec_message;
$ticket->subject=Purifier::clean($request->subject);
$ticket->content=Purifier::clean($request->content);
$ticket->username=$request->username;
$ticket->user_id=$request->user_id;
$ticket->street=$request->street;
$ticket->first_name=$request->first_name;
$ticket->last_name=$request->last_name;
$ticket->email=$request->email;
$ticket->file_name=$request->file_name;

Mail::to($ticket->staff_email)->send(new EmailOpenTicket);
return back()->with('success','Your email message has been sent.');
}

Mail Class If I use:

  public function __construct(Ticket $ticket)
{
  $this->ticket = $ticket;
}

It errors the following:

Type error: Too few arguments to function App\Mail\EmailOpenTicket::__construct(), 0 passed in app\Http\Controllers\AdminController.php on line 71 and exactly 1 expected

Which is this line in the above Admin Controller: $ticket = new EmailOpenTicket;

namespace App\Mail;
use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;
use Illuminate\Contracts\Queue\ShouldQueue;
use App\Ticket;
use App\Admin;

class EmailOpenTicket extends Mailable
{
    use Queueable, SerializesModels;
    public $ticket;
    /**
     * Create a new message instance.
     *
     * @return void
     */
    // public function __construct(Ticket $ticket)
    // {
    //     $this->ticket = $ticket;
    // }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->subject('New Open Maintenance Ticket')->markdown('admin.tickets.emailopenticket');
    }
}

Then my email view:

I read that if I add the ['ticket' => $ticket] it will help pull in the variables... In this case it skips ['ticket' => $ticket] and error on the next line:

Trying to get property of non-object

@component('mail::message', ['ticket' => $ticket])
# 

   has submitted a new maintenance ticket.
Please review and complete as soon as possible

@component('mail::panel')
**Details:**
- **Ticket Type:** Maintenance Request
- **Ticket Number:** 
- **Subject:** 
..etc

I've been at this for 2 days. Would be grateful if someone could lend a hand

via Chebli Mohamed