运行glm_langchain.ipynb 第三行代码后出现none的错误，第六行代码也是如此，此前在其他项目调用API时没有问题

[Yuege007]

from langchain_community.chat_models.zhipuai import ChatZhipuAI
from langchain.schema import HumanMessage, SystemMessage

messages = [

SystemMessage(
    content="You are a smart assistant, please reply to me smartly."
),
HumanMessage(
    content="There were 9 birds on the tree. The hunter shot and killed one. How many birds were there?"
),

]

llm = ChatZhipuAI(
temperature=0.95,
model="glm-4"
)

llm(messages)

---

TypeError Traceback (most recent call last)
[d:](file:///D:/)智谱\glm-cookbook\basic\glm_langchain.ipynb 单元格 7 line 1
4 messages = [
5
6 SystemMessage(
(...)
11 ),
12 ]
14 llm = ChatZhipuAI(
15 temperature=0.95,
16 model="glm-4"
17 )
---> 19 llm(messages)

File d:\python3.11\Lib\site-packages\langchain_core_api\deprecation.py:145, in deprecated..deprecate..warning_emitting_wrapper(*args, **kwargs)
143 warned = True
144 emit_warning()
--> 145 return wrapped(*args, **kwargs)

File d:\python3.11\Lib\site-packages\langchain_core\language_models\chat_models.py:691, in BaseChatModel.call(self, messages, stop, callbacks, **kwargs)
683 @deprecated("0.1.7", alternative="invoke", removal="0.2.0")
684 def call(
685 self,
ref='d:\python3.11\Lib\site-packages\langchain_core\language_models\chat_models.py:1'>1;32m (...)
...
--> 263 if response["code"] != 200:
264 raise RuntimeError(response)
266 content = response["data"]["choices"][0]["content"]

TypeError: 'NoneType' object is not subscriptable