Build button not responding

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

[BUILD] button unresponsive.

Steps to Reproduce

Finished plan mode with opus 4.6. Clicking the build button using composer-1 at the top of the Markdown preview does nothing.

Expected Behavior

Should just start building with composer-1

Screenshots / Screen Recordings

Screenshot 2026-02-08 at 6.28.02 PM.png

Operating System

MacOS

Version Information

Version: 2.4.31
VSCode Version: 1.105.1
Commit: 3578107fdf149b00059ddad37048220e41681000
Date: 2026-02-08T07:42:24.999Z
Build Type: Stable
Release Track: Early Access
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 23.4.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

3

Hey, thanks for the report.

This is a known issue. In Planning mode, the Build button can stop responding. The team is aware and is tracking it.

A couple things you can try as a workaround:

  1. Start a new chat and run the plan again. Does Build work in a fresh session?
  2. After the plan finishes, try reloading the window (Cmd + Shift + P, then “Reload Window”), then click Build.

Also, can you reproduce this reliably, or did it happen just once? And could you copy the Request ID from that chat (top-right menu, then Copy Request ID)? That’ll help us dig in.

Let me know how it goes.