Problems in the Development of thinkphp5 WeChat Mini Programs

I encountered a problem when using thinkphp5.1x to make WeChat Mini Programs"s payment.
the front-end process is to request the order-issuing API first, and then request the payment interface after the order-issuing API is successful.
Front-end Code:

getpay:function(){
  var token=wx.getStorageSync("token");
  wx.request({
    // 
    url: "http://restcms.cncyz.com/api/v1/placeOrder",
    method:"POST",
    header:{
      token:token
    },
    data:{
      // 
      products:[
        {product_id:1, count:3},
        {product_id:11,count:5}
      ]
    },
    success:function(res){
      console.log(res);
      // 
      wx.request({
        url: "http://restcms.cncyz.com/api/v1/pay",
        method: "POST",
        header: {
          token: token
        },
        data: {
          id: res.data.order_id
        },
        success:function(resn){
          // 
          console.log(resn);
        }
      })
    }
  })
}

the problem encountered is
http://restcms.cncyz.com/api/. order interface threw an exception because the user address does not exist

        $data=UserAddress::where("user_id","=",$this->uid)->find();
        if(empty($data)){
            throw new UserException(["msg"=>""]);
        }
        return $data;

Wechat developer tool

what I don"t understand, the first order exception thrown should be terminated. Why is there a payment error message?
the following code is not supposed to be executed. If an exception is thrown, why will it still be executed? and there is an error message

success:function(res){
      console.log(res);
      // 
      wx.request({
        url: "http://restcms.cncyz.com/api/v1/pay",
        method: "POST",
        header: {
          token: token
        },
        data: {
          id: res.data.order_id
        },
        success:function(resn){
          // 
          console.log(resn);
        }
      })

How should the

code be modified? What"s the reason?