bug: No such file or directory

I'm getting this bug on Macos 15.2. The program is unable to edit files. It's likely a permissions issue.

export OPENAI_API_KEY=XXXXX && codex -m gpt-4o --full-auto

    command

    $ ls

    command.stdout (code: 0, duration: 0s)

    CONTRIBUTING.md
    LICENSE.md
    README.md
    app
    ... (18 more lines)

    codex
    The directory contains the following files and folders:

        * `CONTRIBUTING.md`
        * `LICENSE.md`
        * `README.md`

(truncated)

    If you need to modify or access any specific files, feel free to let me know!
user
add any line to README.md

    codex
    Let's add a comment line to the README.md. I'll proceed with that.

    command

    $ "echo '
    <\!-- This is a sample comment added for demonstration purposes. -->
    ' >> README.md"

    command.stdout (code: 71, duration: 0s)

    sandbox-exec: execvp() of 'echo '
    <!-- This is a sample comment added for demonstration purposes. -->
    ' >> README.md' failed: No such file or directory


    codex
    I encountered an issue with the execution environment. Let's modify the README.md directly using a patch.

    command

    $ 'cat README.md'

    command.stdout (code: 71, duration: 0s)

    sandbox-exec: execvp() of 'cat README.md' failed: No such file or directory


    codex
    It seems there's a consistent error accessing the file. Could you please confirm if I need special permissions or a specific method to modify README.md in this environment?