微信公众平台40001错误 invalid credential, access_token is invalid or not latest hint

网站微信公众平台总是报错 {"errcode":40001,"errmsg":"invalid credential, access_token is invalid or not latest hint: [70D7Ma0416vr70!]"}  ，应该是access_token过时了，但直接用浏览器访问$url="https://api.weixin.qq.com/cgi-bin/token?

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