vscode codex extention show blank UI when azure openai provider setted.

[lx1054331851]

What version of the VS Code extension are you using?

0.50.0

What subscription do you have?

I use azure openai with config.toml and .env

Which IDE are you using?

vs code

What platform is your computer?

Darwin 24.6.0 arm64 arm

What issue are you seeing?

codex cli is running properly, but codex extention is show nothing.

few days ago, it is work fine.

What steps can reproduce the bug?

install codex extention, open the extention, it needs to login to chatgpt.

set .env and config.toml, restart vscode and reopen codex extention, it is show nothing.

What is the expected behavior?

No response

Additional information

No response

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Chat panel never loads #4982
• When using custom/local model_provider we still need to either login with ChatGPT or provide API key #5555

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[LarchLiu]

I have the same issue, and downgrading the extention to version 0.4.21 worked for me.

[mhsong55]

Same issue here. As @LarchLiu mentioned, downgrading the extension to version 0.4.21 fixed it for me.

[bolinfest]

Can one of you share what your config.toml looks like? Is it something like (in particular, is model_provider set to the custom provider you have defined?):

model_provider = "azure"

[model_providers.azure]
name = "Azure"
# Make sure you set the appropriate subdomain for this URL.
base_url = "https://YOUR_PROJECT_NAME.openai.azure.com/openai"
env_key = "AZURE_OPENAI_API_KEY"  # Or "OPENAI_API_KEY", whichever you use.
query_params = { api-version = "2025-04-01-preview" }
wire_api = "responses"

[illgitthat]

Can one of you share what your config.toml looks like? Is it something like (in particular, is model_provider set to the custom provider you have defined?):

model_provider = "azure"

[model_providers.azure]
name = "Azure"

Make sure you set the appropriate subdomain for this URL.

base_url = "https://YOUR_PROJECT_NAME.openai.azure.com/openai"
env_key = "AZURE_OPENAI_API_KEY" # Or "OPENAI_API_KEY", whichever you use.
query_params = { api-version = "2025-04-01-preview" }
wire_api = "responses"

@bolinfest

Yes - I have a similar config.toml

model_provider = "azure"
model = "gpt-5-codex"
model_reasoning_effort = "medium"

[model_providers.azure]
name = "Azure"
base_url = "https://deploymentname.openai.azure.com/openai"
env_key = "AZURE_OPENAI_API_KEY"                               # Or "OPENAI_API_KEY", whichever you use.
query_params = { api-version = "2025-04-01-preview" }
wire_api = "responses"

This regression started after 0.4.21 and is present in both the pre-release and stable version of the extension.

[bolinfest]

@illgitthat OK, I set a "fake" custom provider:

model_provider = "azure"

[model_providers.azure]
name = "Azure"
base_url = "https://api.openai.com/v1"
env_key = "AZURE_OPENAI_API_KEY"
wire_api = "responses"

and defined AZURE_OPENAI_API_KEY in my ~/.codex/.env as my OPENAI_API_KEY, but the sidebar loads as normal for me using 0.5.30 in stable VS Code (1.105.1).

Can you add this to settings.json:

"chatgpt.logLevel": "debug",

and then go to the Output pane at the bottom and select Codex from the dropdown and report if there's anything unexpected in those logs?

Alternatively, do Open Webview Developer Tools and see if there is anything suspicious in the console there?

[illgitthat]

@bolinfest
Here are some selected logs from Output >> Codex. I tested vscode insiders and vscode stable.

Potentially relevant:

• That logsetting doesn't appear to be valid?
• I'm on Windows, but running via WSL.
  • To get this to work in the first place, I had to follow the fix described here: Considerations for Using the Azure OpenAI Services Provider #1552 (comment)

2025-10-28 15:59:34.568 [info] Activating Codex extension
2025-10-28 15:59:34.568 [info] [startCodexProcess] spawning codex app-server
2025-10-28 15:59:34.568 [info] Codex chat session item provider not registered: Extension 'openai.chatgpt' CANNOT use API proposal: chatSessionsProvider.
Its package.json#enabledApiProposals-property declares:  but NOT chatSessionsProvider.
 The missing proposal MUST be added and you must start in extension development mode or use the following command line switch: --enable-proposed-api openai.chatgpt
2025-10-28 15:59:47.182 [info] Received MCP result: 82e891b6-0a46-465d-9dde-aedb07c35316 {"items":[{"conversationId":"019a283a-4298-7170-8ed7-88579c91a10f","path":"/home/adam/.codex/sessions/2025/10/27/rollout-2025-10-27T20-31-38-019a283a-4298-7170-8ed7-88579c91a10f.jsonl","preview":"--redacted--","timestamp":"2025-10-26T06:45:53.163Z","modelProvider":"azure"},{"conversationId":"019a1ed4-f25a-75c1-9356-642a1d1ee7c0","path":"/home/adam/.codex/sessions/2025/10/26/rollout-2025-10-26T00-44-23-019a1ed4-f25a-75c1-9356-642a1d1ee7c0.jsonl","preview":"say hi","timestamp":"2025-10-26T04:44:23.514Z","modelProvider":"azure"},{"conversationId":"019a1ed3-6d14-78d2-b760-05af40e3d899","path":"/home/adam/.codex/sessions/2025/10/26/rollout-2025-10-26T00-42-43-019a1ed3-6d14-78d2-b760-05af40e3d899.jsonl","preview":"what's this project","timestamp":"2025-10-26T04:42:43.860Z","modelProvider":"azure"}]}
2025-10-28 15:59:47.182 [info] Received MCP result: c025e30b-2a22-43c0-867a-49a94fa22e45 {"requiresOpenaiAuth":false}
2025-10-28 15:59:47.230 [info] Received MCP result: d9893daf-6eb0-485a-995b-010674dc43bf {"requiresOpenaiAuth":false}
2025-10-28 15:59:47.546 [info] [detectHasWsl] platform: linux
2025-10-28 15:59:47.546 [info] Received MCP result: a2b0bd10-a561-4793-9c25-be27cdbc5d23 {"config":{"approvalPolicy":"on-request","model":"gpt-5-codex","modelReasoningEffort":"medium","profiles":{}}}

[bolinfest]

@illgitthat so the link you sent me to notes that:

I finally confirmed that is a DNS resolve issue from msul implementation.

So are you on Linux or WSL? I guess from the logs, it appears to be Windows/WSL?

[bolinfest]

@illgitthat the log setting is used in the code, but not declared in package.json (to reduce noise), so that's why it appears faded.

@lx1054331851 you noted that the CLI is working, but 0.50.0 is not the one bundled with the extension. On my Mac, the CLI bundled with the extension would is here:

$ ~/.vscode/extensions/openai.chatgpt-0.5.30-darwin-arm64/bin/macos-aarch64/codex --ve
rsion
codex-cli 0.51.0-alpha.2

So for versions 0.5.30 and 0.4.30 of the extension, the CLI is 0.51.0-alpha.2, so I'm curious if that works or not.

[illgitthat]

@bolinfest yes, I'm on Windows using WSL.

And both versions of the CLI work.

adam@DESKTOP1:~$ codex exec "say hi" --skip-git-repo-check
OpenAI Codex v0.50.0 (research preview)
--------
workdir: /home/adam
model: gpt-5-codex
provider: azure
approval: never
sandbox: read-only
reasoning effort: medium
reasoning summaries: auto
session id: 019a2c98-c5c4-7151-bce9-9e6c2b94a425
--------
user
say hi

thinking
**Responding to simple task**

I'll quickly respond with a friendly "hi" since the task is trivial and requires no additional planning!
codex
hi
tokens used
89
hi
adam@DESKTOP1:~$ /mnt/c/Users/adbloom/.vscode-insiders/extensions/openai.chatgpt-0.5.30-win32-x64/bin/linux-x86_64/codex exec "say hi" --skip-git-repo-check
OpenAI Codex v0.51.0-alpha.2 (research preview)
--------
workdir: /home/adam
model: gpt-5-codex
provider: azure
approval: never
sandbox: read-only
reasoning effort: medium
reasoning summaries: auto
session id: 019a2c98-f83a-7372-b7e7-233fa70355eb
--------
user
say hi

thinking
**Responding with greeting**
codex
Hi there!
tokens used
91
Hi there!

[dylan-hurd-oai]

@illgitthat to clarify, are you using the WSL extension in VS Code?

[bolinfest]

@illgitthat thanks, confirming that is extremely helpful! That makes it more likely that a recent change in the extension (as opposed to the CLI) is responsible.

I'm guessing that I know what the answer will be, but if you use the latest Insiders and add these to your settings.json:

  "github.copilot.chat.useResponsesApi": true,
  "chat.agentSessionsViewLocation": "view",

Do you see the new icon in the Activity Bar that brings up the new Agent Sessions pane? If so, do you have the OpenAI Codex header in the pane, which hopefully has a list of recent conversations:

Clicking on a conversation should open it in an editor pane, though given what you're seeing in the sidebar, I assume that shows up blank, as well?

The one other thing that might be revealing is Open Webview Developer Tools from the command palette:

And then perhaps the Console of that pane has an error message that explains why the UI isn't loading in the sidebar?