我在返回网站上的视图时遇到问题，我不断收到此错误ErrorExceptioncount(): Parameter must be an array or an object that implements Countable (View: C:\xampp\htdocs\cargo\resources\views\shipment\single.blade.php)这个错误指向我的刀片文件中导致该错误的部分，下面是我的视图刀片文件 <div class="card" >    <div class="card-body ">        @if(count($shipment) >0)       @foreach($shipment as $shipment)                <div class="shipment-number">        <span class="title" style="display: block; font-size: 25px!important;">{{$shipment->tracking_code }}</span>    </div><!-- Track_Num --></div><br><br><div id="shipper-info" class="row" >        <div class="col-md-6 detail-section">            <p class="shipper details"><strong>Shipper's Information</strong></p>            <div class="shipper details">            <p><span class="label">Shipper Name : </span>{{$shipment->sender_name }}</p>            <p><span class="label">Phone Number : </span>{{$shipment->telephone }}</p>            <p><span class="label">Email : </span>{{$shipment->sender_email }}</p>            <p><span class="label">Address : </span>{{$shipment->sender_address }}</p>                    </div>    </div>            <div class="col-md-6 detail-section">            <p class="shipper details"><strong>Receiver's Information</strong></p>            <div class="receiver details">            <p><span class="label">Receiver Name : </span>{{$shipment->receiver_name }}</p>            <p><span class="label">Phone Number : </span>{{$shipment->receiver_telephone }}</p>            <p><span class="label">Address : </span>{{$shipment->receiver_address }}</p>            <p><span class="label">Email : </span>{{$shipment->receiver_email }}</p>                </div>    </div>        <div class="clear-line"></div></div>@endforeach@esle@endif并且错误指向此部分@if(count($shipment) >0)       @foreach($shipment as $shipment)