Codex not loading on latest Cursor version (1.6.27)

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Codex is not loading at all after updating to the latest version of Cursor. It stays stuck in the loading state and never finishes.

I’ve already tried the following without success:

Restarting Cursor

Uninstalling Codex and reinstalling it

Ensuring I’m not using a VPN

Environment details:

Cursor Version: 1.6.27

VSCode Version: 1.99.3

Commit: d750e54bba5cffada6d7b3d18e5688ba5e944ad0

Date: 2025-09-17T20:21:17.042Z

Electron: 34.5.8

Chromium: 132.0.6834.210

Node.js: 20.19.1

V8: 13.2.152.41-electron.0

OS: Darwin arm64 25.0.0

Screenshots attached for reference.

Steps to Reproduce

Open Cursor (v1.6.27).

Navigate to Codex from the left sidebar.

Observe that Codex remains stuck in the loading state and never finishes.

Screenshots / Screen Recordings

CleanShot 2025-09-19 at 10.52.41@2x.png
CleanShot 2025-09-19 at [email protected]2524×1602 192 KB

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.6.27
VSCode Version: 1.99.3
Commit: d750e54bba5cffada6d7b3d18e5688ba5e944ad0
Date: 2025-09-17T20:21:17.042Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 25.0.0

2

Running into the same Issue:
Cursor Version 1.6.35
On Windows

3

Hey @xenioscharalambous @Hao_Wen, thanks for the report. Does the Codex panel fail to load when you open a blank Cursor window as well? Please also check the DevTools panel for any errors.

4

Screenshot 2025-09-22 at 17.07.31
Screenshot 2025-09-22 at 17.07.31642×1734 15.8 KB

running into the same issue

5

Fails in blank window too yes. Have had this issue for many days now.

6

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

After clicking on the ChatGPT client connection cursor interface(work with cursor), it jumps to the page for installing Codex – OpenAI’s coding agent.
However, I have already installed it, and it used to work before, but after a recent update, it can no longer connect.

Steps to Reproduce

Keeps appearing

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.6.45
VSCode Version: 1.99.3
Commit: 3ccce8f55d8cca49f6d28b491a844c699b8719a0
Date: 2025-09-22T18:22:38.013Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

7

image
image640×676 40.8 KB

image
image2134×1312 333 KB

8

Has anyone found a solution to this issue yet?

Version: 1.6.45 (user setup)
VSCode Version: 1.99.3
Commit: 3ccce8f55d8cca49f6d28b491a844c699b8719a0
Date: 2025-09-22T18:22:38.013Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

9

Guys, I found the solution. I had wrong MCP configuration. That’s what was causing the issue. Actually cursor it self fixed it lol

1 Like
10

What is your new MCP configuration setting? I don’t think I had the Codex setup over MCP.

11

I had this issue because of incorrect configuration in ~/.codex/config.toml, after removing the broken part, it started working.

As an enhancement, I’d like to skip the wrong config, rather than break the whole extension fully

12

Thanks @Alexey_Krutilko That fixed mine as well. Updated the config.toml to this.

On windows it is located at C:\Users.codex\config.toml

~/.codex/config.toml

Global defaults

model = “gpt-5-codex”
approval_policy = “on-request”
sandbox_mode = “workspace-write”

Optional: per-project trust settings

[projects.“/abs/path/to/your/repo”]
trust_level = “trusted”

Profiles

[profiles.auto]
model = “gpt-5-codex”
sandbox_mode = “workspace-write”
approval_policy = “never”

[profiles.safe]
model = “gpt-5”
sandbox_mode = “read-only”
approval_policy = “on-request”

15

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Hello team,

I’m having a problem: Codex won’t load after updating to the latest version of Cursor. It gets stuck in loading mode and never finishes.

I’ve already tried the following solutions, but without success:

  • Reinstalling the CODEX extension.
  • Reinstalling Cursor (after restarting).
  • Making sure I’m not using a VPN.
  • Clearing the cache and temporary Windows files.

My version of Cursor:

Version: 1.7.54 (system setup)
VSCode Version: 1.99.3
Commit: 5c17eb2968a37f66bc6662f48d6356a100b67be0
Date: 2025-10-21T19:07:38.476Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26200

Operating system: Windows 11 25h2 (OS build: 26.2006901)

Translated with DeepL.com (free version)

Steps to Reproduce

Open Cursor,

Go to Codex from the left sidebar.

Note that Codex gets stuck loading and never finishes.

Screenshots / Screen Recordings

Capture d'écran 2025-10-27 195731.png
Capture d'écran 2025-10-27 195731.png308×1025 2.97 KB

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.54 (system setup)
VSCode Version: 1.99.3
Commit: 5c17eb2968a37f66bc6662f48d6356a100b67be0
Date: 2025-10-21T19:07:38.476Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Codex

Does this stop you from using Cursor

No - Cursor works, but with this issue

16

after hours of struggles i figured it out. uninstall cursor
make sure these are deleted
Remove-Item “$env:LOCALAPPDATA\Programs\Cursor” -Recurse -Force -ErrorAction SilentlyContinue
Remove-Item “$env:APPDATA\Cursor” -Recurse -Force -ErrorAction SilentlyContinue
Remove-Item “$env:USERPROFILE.cursor” -Recurse -Force -ErrorAction SilentlyContinue
Remove-Item “$env:USERPROFILE.codex” -Recurse -Force -ErrorAction SilentlyContinue

reinstall and your off the races :slight_smile:

Title: Codex fails to start on Windows when ~/.codex/config.toml is JSON or missing
Symptoms: /usr/bin/bash not found, exit code 127, no .codex regeneration
Reproduction:

  1. Delete .codex
  2. Launch Cursor → Codex never starts
  3. Safe Mode works
    Root Cause: Empty or malformed config.toml (JSON instead of valid TOML) causes CLI parse failure.
    Fix: Replace ~/.codex/config.toml with valid TOML or let installer regenerate.
17

I also encountered an issue where the Codex plugin couldn’t be loaded. It hasn’t been able to open since the update.

image
image552×1066 6.82 KB

18

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

The Codex extension stopped working after the update on November 3, 2025. It just keeps loading indefinitely. I’ve already tried reinstalling it and deleting the auth.json file to reauthenticate, but that didn’t resolve the issue.

Steps to Reproduce

I’ve just opened Cursor and tried to access Codex.

Expected Behavior

Codex works properly and load chats/AI agent.

Screenshots / Screen Recordings

codex cursor error.png
codex cursor error.png674×1053 4.14 KB

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.54 (system setup)
VSCode Version: 1.99.3
Commit: 7a31bffd467aa2d9adfda69076eb924e9062cb20
Date: 2025-11-03T22:40:44.657Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

Does this stop you from using Cursor

No - Cursor works, but with this issue

2 Likes
19

bumping as this is a new issue with Cursor+Codex as of Nov 3rd,

20

Please update - this version of Cursor is almost 2 months old

21

Did you look at the latest responses? I’m on version below, still have same issue, not a toml file issue as it was working fine before:

Version: 2.0.63 (user setup)
VSCode Version: 1.99.3
Commit: 505046dcfad2acda3d066e32b7cd8b6e2dc1fdc0
Date: 2025-11-05T18:56:58.213Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.19045

image
image699×2000 13.5 KB

22

It persists even after updating to newest version:

Version: 2.0.63 (system setup)
VSCode Version: 1.99.3
Commit: 505046dcfad2acda3d066e32b7cd8b6e2dc1fdc0
Date: 2025-11-05T18:56:58.213Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200