ChatGPT o1 always returned error after thinking

Today, I always encountered an error like this when use 01 model:
Thought for 4 seconds
There was an error generating a response

Example:
Can you help me write a function? I have the requirements and need assistance with implementation.

Thought for 4 seconds

There was an error generating a response

I always try to check again after wait an hour but the problem is still exists.

Maybe, today before this problem happens: I create a project in my ChatGPT plus subscription, then I make a prompt in 01 to help me fix my code after that it not generating response and show me error.

After that, this problem continues as I make a new prompt not in projects, I also already delete all project.