Keep gettig langchain API connectionError retries

[DavidCurryHan]

as shown in the image
I have followed the instruction and successfully train the rasa model and actived the GUI interface.
However as long as i type anything, the CALM-demo keep giving me this openai APIconnectionError shown in yellow.
Since I have successfully train the model, the program should have accessed the openai with no problem, it should not be a API key problem.
Also, I have write my own script of "OPENAI.chat.completions.create" which also works fine with the openai library version above 1.0.0.(since this rasa framework is using openai version 0.28.1)
I have installed the openai back to 0.28.1 and tried to set the timeout to 100seconds. I have also tried to set my proxy port to localhost:7890 and OPENAI_API_BASE to "https://openai.wndbac.cn/v1".
Eventually, the error stays.
Im not sure if its an openai problem (since the model training worked at 0.28.1 and script worked at 1.0.0) or its a problem from the rasa end.
Can anyone help? thankyou!