更新

app/Services/UserService.php

@@ -152,6 +152,7 @@ class UserService
             ->select(['users.id','users.created_at','users.is_vip','users_info.nickname'])
             ->orderBy('id','desc')
             ->paginate(request('prePage',10));
+        $list = $list->toArray();
         foreach ($list['data'] as $k=>$v){
             $list['data'][$k]['created_at'] = date('Y/m/d',strtotime($v['created_at']));
         }