Codex Windows app 26.623.3763.0 does not launch after update

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

26.623.3763.0

What subscription do you have?

ChatGPT Pro

What platform is your computer?

Windows 11 25H2 os 26200.8655 x64 $([Environment]::OSVersion | ForEach-Object VersionString) $(if ([Environment]::Is64BitOperatingSystem) { "x64" } else { "x86" })

What issue are you seeing?

After updating to Codex Desktop 26.623.3763.0, the application no longer launches.

Initially Windows displayed:

Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item.

After reinstalling, the error dialog disappeared, but the application still does not launch.

Current behavior:

No window appears.
No Codex process is created.
No Application Event Log entries are generated.
Launching via shell:AppsFolder also does nothing.

The Codex CLI works normally on the same machine.

What steps can reproduce the bug?

Update Codex Desktop to version 26.623.3763.0.
Launch Codex from:
Start Menu
Search
shell:AppsFolder
The application silently fails to start.

Troubleshooting already attempted:

Repair
Reset
Uninstall
Reinstall
Reboot
Re-register AppX package
Launch via shell:AppsFolder
Verified package registration (Status = Ok)
Verified StartApps registration
Store cache reset (wsreset)

PowerShell results:

Get-AppxPackage OpenAI.Codex

Status: Ok
PackageFamilyName: OpenAI.Codex_2p2nqsd0c76g0
PackageFullName: OpenAI.Codex_26.623.3763.0_x64__2p2nqsd0c76g0
Get-StartApps | findstr Codex

Codex OpenAI.Codex_2p2nqsd0c76g0!App
Get-Process Codex

(no output)
Get-Process | findstr -i codex

(no output)

The desktop application never creates a process.

What is the expected behavior?

The Codex Desktop application should launch normally and create a running process

Additional information

Windows Store installation.
Codex CLI works without any issues.
The problem only affects the Windows desktop application.
The package is correctly installed and registered, but launching it produces no process, no window, and no event