/undo command not being recognized

Question

### What version of Codex is running?

0.79.0

### What subscription do you have?

pro

### Which model were you using?

_No response_

### What platform is your computer?

_No response_

### What issue are you seeing?

I've set undo=true in the config.toml of codex, but it seems like the undo command is not recognized.

### What steps can reproduce the bug?

Uploaded thread: 019b9817-5571-7dc0-b3d4-a686d844c413

### What is the expected behavior?

_No response_

### Additional information

_No