Windows app crashes immediately after launch (26.609.3341.0)

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

26.609.3341.0

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Windows 11 x64

What issue are you seeing?

The Codex Windows application worked normally before, but starting on 2026-06-12 it began crashing immediately after launch.

Symptoms:

Codex.exe appears in Task Manager for 1-2 seconds and then exits.
No error dialog is displayed.
No Application Error, AppCrash, or .NET Runtime events appear in Event Viewer.
Reliability Monitor does not show any Codex crash entries.
Crashpad dump (.dmp) files are generated on every launch attempt.

Environment:

Codex App Version: 26.609.3341.0
Microsoft Edge WebView2 Runtime: 149.0.4022.62
Windows 11 x64
ChatGPT Plus subscription

Troubleshooting already attempted:

Uninstalled and reinstalled Codex
Rebooted Windows multiple times
Cleared LocalCache, LocalState, and Settings folders
Renamed the Codex web profile/cache folders
Repaired Microsoft Visual C++ Redistributable (x64)
Verified WebView2 Runtime installation
Verified AppX package status is healthy ("Status: Ok")

Latest log output:

2026-06-12T06:58:00.950Z info Launching app agentRunId=null allowDebugMenu=false allowDevtools=false allowInspectElement=false buildFlavor=prod enableSparkle=false enableUpdater=true nodeEnv=undefined packaged=true platform=win32

2026-06-12T06:58:02.178Z info Appshot hotkey inactive configured=true enabled=true platform=win32

The application exits immediately after these log entries and no additional logs are generated.

Crashpad dump files are created under:

C:\Users<USER>\AppData\Local\Packages\OpenAI.Codex_2p2nqsd0c76g0\LocalCache\Roaming\Codex\web\Codex\Crashpad\reports

Could you please advise how to collect more detailed crash information or whether this is a known issue with version 26.609.3341.0?

What steps can reproduce the bug?

Install Codex Windows app from the Microsoft Store.
Launch Codex from the Start menu or from the ChatGPT web Codex entry.
Codex.exe appears in Task Manager for about 1-2 seconds.
The app exits immediately without showing any window or error dialog.

No code snippet is required because the crash happens before any session or project can be opened.

Session ID: Not available. The app crashes before a session starts.
Token limit/context usage: Not applicable. The app crashes during application startup.

What is the expected behavior?

The Codex Windows app should open normally and show the login/workspace screen instead of exiting immediately after launch.

Additional information

The app worked normally before, but started crashing on 2026-06-12.

Environment:

Codex App Version: 26.609.3341.0
WebView2 Runtime: 149.0.4022.62
Windows 11 x64
Subscription: ChatGPT Plus

Troubleshooting attempted:

Reinstalled Codex
Rebooted Windows
Cleared LocalCache, LocalState, and Settings
Renamed Codex web profile/cache folders
Repaired Microsoft Visual C++ Redistributable x64
Verified WebView2 Runtime installation
Verified AppX package status is Ok

Latest log output:

2026-06-12T06:58:00.950Z info Launching app agentRunId=null allowDebugMenu=false allowDevtools=false allowInspectElement=false buildFlavor=prod enableSparkle=false enableUpdater=true nodeEnv=undefined packaged=true platform=win32

2026-06-12T06:58:02.178Z info Appshot hotkey inactive configured=true enabled=true platform=win32

Crashpad dump files are generated on every launch attempt under:

C:\Users<USER>\AppData\Local\Packages\OpenAI.Codex_2p2nqsd0c76g0\LocalCache\Roaming\Codex\web\Codex\Crashpad\reports

No Windows Event Viewer error or Reliability Monitor AppCrash entry is generated.