错误:内部服务器错误Laravel 5.4 ajax调用

id

$.ajax({
    url:'/delprofile',
    type: 'delete',
    data: {  
       id: 5,
       '_token': $('meta[name="csrf-token"]').attr('content')
    },
    success: function(){ alert("Record deleted.") },
    error: function(jqXHR, textStatus, errorThrown) {
      console.log(textStatus + ' : ' + errorThrown);
    }
});

Laravel函数:

Route::delete('/delprofile','ProfileController@delprofile');

public function delprofile (Request $request){
   $id=$request->input('id');
   DB::table('education')->where('id','=',id)->delete();
}