Cannot start Codex CLI since v0.84.0

What version of Codex is running?

0.84.0, 0.85.0

What subscription do you have?

Enterprise & Edu

Which model were you using?

_No response_

What platform is your computer?

Darwin 24.6.0 arm64 arm

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

_No response_

What issue are you seeing?

I encountered a problem where codex cannot start since I updated to v84.0. The error message is here:

› codex
Error: invalid type: unit variant, expected string only in 'web_search

The error was not shown when downgrading to v0.81.0

What steps can reproduce the bug?

Run codex in terminal.

What is the expected behavior?

_No response_

Additional information

_No response_