Major Codex Desktop Regression Makes App Unusable.

What version of the Codex App are you using (From “About Codex” dialog)?

26.608.12217

What subscription do you have?

Pro 20x

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

Trying to find out how to downgrade codex desktop because every single time I try to do anything after updating to this latest version I see this error without fail:

Invalid Value: 'tools'. Function 'functions.spawn_agent' declares encrypted parameters but is not configured for encrypted tool use by this model.

What steps can reproduce the bug?

It happens if I send any message at all
<img width="819" height="231" alt="Image" src="https://github.com/user-attachments/assets/5e0e622e-8409-485d-930c-7b6d799dc38e" />

What is the expected behavior?

_No response_

Additional information

_No response_