Codex CLI 503 Service Unavailable

What version of Codex CLI is running?

codex-cli 0.128.0

What subscription do you have?

business

Which model were you using?

gpt5.5,gpt5.4,gpt5.3

What platform is your computer?

windows

What terminal emulator and version are you using (if applicable)?

vscode

What issue are you seeing?

<img width="1170" height="51" alt="Image" src="https://github.com/user-attachments/assets/4e93a507-7aa6-4784-8ac2-2e3231982698" />

What steps can reproduce the bug?

just prompting normally and suddenly it say this

What is the expected behavior?

_No response_

Additional information

_No response_