-41003: aes 解密失败

[qq_30791467]

场景：分享页面到微信群，获取微信群的openGId，昨天还好好的，今天就一直显示-41003这个错误代码。
小程序代码：

onShareAppMessage: function () {
    var that=this;
      return {
      title: '分享页面',
      path: '/pages/activity/activity',
      success: function (res) {
        // 转发成功
        
        wx.getShareInfo({
          shareTicket: res.shareTickets[0],
          success:function(e){
            console.log(e);
            //解密获得群id
            wx.request({
              url: 'https://www.123.com/index.php?m=Home&c=Activity&a=getOpenGid',
              method:'post',
              data:{
                'session_key':session_key,
                'encryptedData': e.encryptedData,
                'iv':e.iv
              },
              header: {
                'Content-Type': 'application/x-www-form-urlencoded',
                'Cookie': 'PHPSESSID=' + session_id + '; path=/'
              },
              success:function(e){
                console.log(e.data);
                },
          fail:function(){
              //分享的不是微信群，在这里提示
              that.setData({
                display:'block',
              })
            setTimeout(function () {
              that.setData({
                display: 'none',
              })
            }, 2000)
           
          }
        })
      },
      fail: function (res) {
        // 转发失败
      }
    }
  }

接口代码：

 public function getOpenGid(){
            vendor('decode.wxBizDataCrypt');
            $appid = 'wxasdasdasdas3fcb3';
            $sessionKey = I('post.session_key');
            $encryptedData=I('post.encryptedData');
            $iv = I('post.iv');
            $data='';
            $pc = new \WXBizDataCrypt($appid, $sessionKey);
            $errCode = $pc->decryptData($encryptedData, $iv,$data);
            $data=json_decode( $data);
            $data=$this->object_array($data);

            $data2['code']=$errCode;
            $data2['info']=$data;
            $this->ajaxReturn($data2);
        }