Class 'Admin::class' not found (View:... in laravel 8 - php

Question

Whene i would right a name for a person who i have a secondly key he give me this probleme ,so i right this type of code in larvel 5 so i don't know this is a problem in laravel 8 when i would changed in more details or another problem for more explication this is my code :
<thead>
<tr>
<th scope="col">name</th>
<th scope="col">Adress</th>
<th scope="col">number</th>
<th scope="col">admin name</th>
</tr>
</thead>
#if($administrations)
#foreach($administrations as $administration)
<tbody>
<tr>
<th scope="row">{{$administration->name}}</th>
<td>{!!$administration->adress!!}</td>
<td>{{$administration->number}}</td>
<td>{{$administration->admins->name}}</td>
</tr>
</tbody>
#endforeach
#endif
And this is a code for my controller :
public function storefac(Request $request){
$this->validate($request,[
"name"=> 'required',
"number"=>'required',
"adress"=>'required',
]);
$id=Auth::user()->id;
$emps=new Administrations;
$emps->name=$request->input('name');
$emps->adress=$request->input('adress');
(integer)$emps->number=$request->input('number');
$emps->id_superAdmin=$id;
$emps->save();
return redirect()->back()->with('success','data saved');
And code for my two models ( admin and administration):
class Administrations extends Model
{
protected $fillable = [
'name',
'address',
'number',
'id_Admin'
];
public function admin()
{
return $this->belongsTo('Admin::class');
}
class Admin extends Model
{
protected $fillable = [
'name',
'grade',
'adress',
'number',
'id_user'
];
public function users()
{
return $this->belongsTo(User::class');
}
public function administrations ()
{
return $this->hasOne('Administrations::class');
}

Answer 1

Are Admin and Administration in the same file? If so they need to be in their own file. And I can see you don't close the Administrations class correctly. Also I can see that your foreign keys aren't compatible with laravel either you can rename them to 'user_id' and 'admin_id' or you can do this.
$this->belongsTo(Admin::class, 'id_admin');
And
$this->belongsTo(User::class, 'id_user');