CORS issues with Copilot Web UI

[ngrigoriev]

🏷️ Discussion Type

Bug

💬 Feature/Topic Area

Copilot in GitHub

Body

It used to work in the past, but has been broken for a couple of weeks now.

Browser: LibreWolf (hardened Firefox version)

This is what is logges on the Web console when opening https://github.com/copilot. Chats do not load. UI is unusable.

Content-Security-Policy: The page’s settings blocked the loading of a resource (media-src) at data: because it violates the following directive: “media-src https://github.com/ https://user-images.githubusercontent.com/ https://secured-user-images.githubusercontent.com/ https://private-user-images.githubusercontent.com/ https://github-production-user-asset-6210df.s3.amazonaws.com/ https://gist.github.com/ https://github.githubassets.com/” [copilot](https://github.com/copilot)
Matched leaf route at location "/copilot" does not have an element or Component. This means it will render an <Outlet /> with a null value by default resulting in an "empty" page. [chunk-EPOLDU6W.mjs:193:49](https://github.githubassets.com/assets/node_modules/react-router/dist/development/chunk-EPOLDU6W.mjs)
Ignoring unsupported entryTypes: layout-shift. [observer.ts:69:19](https://github.githubassets.com/assets/packages/web-vitals/cls/observer.ts)
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.enterprise.githubcopilot.com/github/chat/threads?. (Reason: CORS request did not succeed). Status code: (null).
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.enterprise.githubcopilot.com/models. (Reason: CORS request did not succeed). Status code: (null).
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.enterprise.githubcopilot.com/agents/tasks?page=1&archived=false&include_counts=true&per_page=5. (Reason: CORS request did not succeed). Status code: (null).

api.enterprise.githubcopilot.com resolves correctly.

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