我使用以下内容进行社交媒体登录的应用程序 https://github.com/madewithlove/laravel-oauth2
但我得到这个错误
Symfony \ Component \ Debug \ Exception \ FatalErrorException
Interface 'JsonSerializable' not found
open: /Applications/AMPPS/www/docsearch/vendor/madewithlove/laravel-oauth2/src/OAuth2/Token/Access.php
* @package OAuth2
* @category Token
* @author Phil Sturgeon
* @copyright (c) 2011 HappyNinjas Ltd
*/
class Token_Access extends Token implements \JsonSerializable
{
/**
* @var string access_token