Cannot add foreign key constraint?

Question

MySQL

I'm trying to create links between users and subscriptions.
The order in which the tables were created is correct. First users, then subscriptions.
Subscription migration

Schema::create('subscriptions', function ($table) {
           $table->engine = 'InnoDB';

           $table->increments('id');
           $table->integer('user_id')->unsigned();
           $table->string('name');
           $table->string('stripe_id');
           $table->string('stripe_plan');
           $table->integer('quantity');
           $table->timestamp('trial_ends_at')->nullable();
           $table->timestamp('ends_at')->nullable();
           $table->timestamps();

           $table->foreign('user_id')->references('id')->on('users')->onDelete('set null');
       });

// возможно это поможет, этот участок тоже не работат
 public function down()
      {
         Schema::dropIfExists('subscriptions');
 // migrate:refresh не работает, выдает что таблица уже есть хотя эта функция должна ее сбрасывать.
     }

Mistake

[Illuminate\Database\QueryException]
  SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL:
   alter table `subscriptions` add constraint `subscriptions_user_id_foreign`
  foreign key (`user_id`) references `users` (`id`) on delete set null)



  [PDOException]
  SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint

As you can see, it prohibits creating a connection.
Tried:
1 - recreate migrations
2 - add InnoDB