Title: Agent mode fails in Cursor desktop UI, web Agents page Send button stays disabled, while CLI agent still works
Environment:
• App: Cursor desktop UI
• Also tested in Cursor CLI
• OS: macOS
• Web page also affected: https://cursor.com/agents
Steps to reproduce in Cursor desktop UI:
- Open Cursor desktop
- Open Agent mode
- Select Codex 5.3
- Submit a request
- Observe the error
Expected behavior:
• The request should be sent with the selected model
• Agent mode should respond normally
Actual behavior:
• The request fails with ERROR_RESOURCE_EXHAUSTED
• The error says Cursor is experiencing high demand for Composer 2
• This is unexpected because the selected model was Codex 5.3
Steps to reproduce on web:
- Open the Agents page while signed in
- Type any prompt
- Observe the Send button
Expected behavior:
• The Send button should become enabled after entering a prompt
Actual behavior:
• The Send button remains disabled no matter what I type
• No request can be submitted from the web UI
What I already checked:
• Desktop network diagnostics are successful for DNS, HTTP/2, SSL, API, Agent, and Authentication
• The web issue also happens in an InPrivate window, so it does not appear to be a cache/cookie issue
• Cursor CLI agent is working normally in the same environment
• This suggests the problem is specific to the desktop UI and web UI paths rather than a general account or network outage
Why this looks like a product issue:
• In desktop UI, there may be a model-routing mismatch where Agent mode is still hitting Composer 2 even though another model is selected
• On web, the issue happens before any request is sent, suggesting a frontend/session/entitlement/model-loading problem
• Since CLI agent works, the failure seems isolated to Cursor desktop UI Agent mode and the web Agents page
Related request IDs:
• d16cda02-77e7-466d-984f-a0b1655c17ea
• abf2083c-1c4b-4196-866a-a599dfd5eb10