Laravel Ajax POST 500 (Internal Server Error) - ajax

Question

I'm trying to add a new row to my datatable with ajax
This is my modal for adding a new row:
<div id="modal-add-team" class="modal fade" aria-hidden="true" role="dialog" novalidate>
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-body">
<div class="row">
<button type="button" class="close" data-dismiss="modal">×</button>
<div class="col-sm "><h3 class="text-center m-t-none m-b">Add Team</h3>
<p>Add Team</p>
<div class="form-group"><label>Team Name</label> <input type="text" placeholder="Enter Name" class="form-control" id="name" name="name" required> #if ($errors->has('name')) <p class="help-block">{{ $errors->first('name') }}</p> #endif
</div>
<div class="form-group"><label>Parent Team</label> <input type="text" placeholder="Enter Niche" class="form-control" id="parent-id" name="parent-id"></div>
<button id="addTeam" class="btn btn-sm btn-primary pull-right m-t-n-xs" type="submit" style="width: 100%;" onclick="pressOnlyOnce()" ><strong>Add</strong></button>
</div>
</div>
</div>
</div>
</div>
This is my ajax:
$.ajax({
type: 'POST',
url: '{{ url('/ajax/add-team') }}',
data: {
'_token': $('input[name=_token]').val(),
'name': $('input[name=name]').val(),
'parent_id': $('input[name=parent_id]').val()
},
success: function(data) {
if ((data.errors)){
$('.error').removeClass('hidden');
$('.error').text(data.errors.name);
}
else {
$('.error').addClass('hidden');
window.location.href='{{ url('/teams') }}';
$('#table').append("<tr class='item" + data.id + "'><td>" + data.id + "</td><td>" + data.name + "</td><td><button class='edit-modal btn btn-info' data-id='" + data.id + "' data-name='" + data.name + "'><span class='glyphicon glyphicon-edit'></span> Edit</button> <button class='delete-modal btn btn-danger' data-id='" + data.id + "' data-name='" + data.name + "'><span class='glyphicon glyphicon-trash'></span> Delete</button></td></tr>");
}
},
});
$('#name').val('');
But it doesn't even reach the point where it goes to my controller. It just says that error 500... Where did I go wrong?