Demo请求报错，能帮忙看下吗？

[LONGMIAOMIAO]

request请求已经做好了，但是好像 rapidjson 这里好像出了点问题！

This is the request: 
https://api.huobi.pro/market/history/kline?symbol=btcusdt&period=1min&size=100
This is the original response from the server: 

marketdemo: /home/yyy/GitPro/huobi_Cpp/include/rapidjson/document.h:1154: rapidjson::GenericValue<Encoding, Allocator>::MemberIterator rapidjson::GenericValue<Encoding, Allocator>::FindMember(const rapidjson::GenericValue<Encoding, SourceAllocator>&) [with SourceAllocator = rapidjson::MemoryPoolAllocator<>; Encoding = rapidjson::UTF8<>; Allocator = rapidjson::MemoryPoolAllocator<>; rapidjson::GenericValue<Encoding, Allocator>::MemberIterator = rapidjson::GenericMemberIterator<false, rapidjson::UTF8<>, rapidjson::MemoryPoolAllocator<> >]: Assertion `IsObject()' failed.