Sandbox error error running landlock: Sandbox(LandlockRestrict) using Codex in the browser

What version of Codex is running?

This is version of the codex in the current (17th December 2025) web browser version

What subscription do you have?

Plus

Which model were you using?

I do not know

What platform is your computer?

Darwin 25.0.0 arm64 arm

What issue are you seeing?

When I try to execute any prompt using Codex in the web browser, I am getting an error:

Unable to execute repository commands due to sandbox denial ("error running landlock: Sandbox(LandlockRestrict)"). No files were modified, and no branch or commit could be created. Testing failed with pwd command immediately blocked (❌).

Summary
Unable to proceed: every shell command fails with error running landlock: Sandbox(LandlockRestrict), so no files were modified and no branch/commit/PR actions were possible.

Testing
❌ pwd (fails immediately with error running landlock: Sandbox(LandlockRestrict))

I have also tried deleting an environment and recreating it, and observed the same behaviour.

What steps can reproduce the bug?

Create a new environment.
Ask Codex to check the project and give a summary of what it's about.
Example: https://chatgpt.com/s/cd_69432036cec88191a5dfc9efdfe84574

What is the expected behavior?

It should set up the environment, check out the project, and work with it.

Additional information

_No response_