Unable to use cursor. Cursor IDE Agents: "An unexpected error occurred" when sending a chat

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Cursor web Agents: “An unexpected error occurred” when sending a chat.

Request ID 1: 1de52437-e518-4a0a-9269-800dde3530aa
Request ID 2: 5427acae-dfce-49a0-954a-f7b32a26347d

Context:

  • Surface: cursor.com Agents (New Chat), “No Repo”, “This PC”
  • Prompt: “hi”
  • Model: Grok 4.6 Medium
  • Error: An unexpected error occurred.
  • Account: [email protected]

Please look these IDs up on your side and say whether the requests reached the backend or were dropped on the path.

Steps to Reproduce

just added a prompt but cursor didnt reponded back

Screenshots / Screen Recordings

Operating System

Windows 10/11

Version Information

For Cursor IDE

Does this stop you from using Cursor

Yes - Cursor is unusable

Hey @ashutoshmodgil, thanks for the report and for both Request IDs. That really helped.

I checked both entries. Neither request reached our servers. Each one waited about a minute for the component that runs agents locally inside the Cursor window on your PC. When that component didn’t start, Cursor stopped the send with “An unexpected error occurred”. Your account, model, and network are fine. Your cloud agent runs normally, so this isn’t an account setup issue.

This is a known issue we’re tracking on Windows, and I made a change on our side that should move you off the problematic path. To apply it:

  1. Close Cursor.
  2. Open Task Manager and end any remaining Cursor processes.
  3. Reopen Cursor and the laavaya-divine folder.
  4. Start a new chat and send “hi”.

If it still crashes, a fresh Windows machine is often missing a system component Cursor needs:

  1. Install Microsoft Visual C++ 2015-2022 Redistributable (x64) from Microsoft. Search for vc_redist.x64.
  2. Make sure Cursor is installed in the default folder on drive C:.
  3. Fully close Cursor (steps 1-2) and repeat step 4.

If it still doesn’t work, press Ctrl+Shift+P, run “Capture and Send Debugging Data” from the crashing window, accept the defaults, and attach the saved zip here. Privacy Mode is on, so Cursor will save the file locally instead of uploading it. Also, in the editor window (the “IDE” button in the top-right of the Agents Window), open View > Output, pick “Cursor Agent Host” in the dropdown, and paste what you see there. Or tell me if that option isn’t in the list.

In the meantime, “Run in Cloud” works for you if you need to keep going. Let me know how it goes.

For reference, a similar case with a fix is here: Cursor IDE Agent not working – Agent Host Bridge timeout