Cursor is unresponsive after sending a prompt to plan

[mjay]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

If I try to send a prompt with the Agent mode and select Plan and sent out the prompt, I see the plan being generated however the whole application where you cannot do anything.

I see the animated message “Planning next moves” but Cursor application is unresponsive and you need to close by Task Manager. I will get an error message presented by Task Manager: “The operation could not be completed. The operation is not valid for this process.”

After restarting the application, the plan is gone and I need to resend the prompt and gets stuck again - like a loop.
This happens also with a regualr chat.

Steps to Reproduce

Go the Agents Mode, give a prompt and select “Plan”. After creating the plan the app freezes and doesn’t continue and you cannot move the application window at all.

Expected Behavior

Well the usual, I should click and proceed, abort modifiy whatever.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.46 (system setup)
VSCode Version: 1.105.1
Commit: ab326d0767c02fb9847b342c43ea58275c4b1680
Date: 2025-12-02T03:59:29.283Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Opus 4.5

For AI issues: add Request ID with privacy disabled

ba513325-2025-49ec-8c78-4cfb6edfb6b1

Additional Information

I have tried running Cursor with: cursor --disable-extensions but didn’t helped out.

I even have reinstalled the application completly but the issue persists.

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, thanks for the report. It looks like a known issue with “stuck on Planning next moves” - we’re already tracking it here: The Cursor IDE freezes at the "planning next moves" stage.

We need specific data to move forward:

• Please run Settings > Network > Run Diagnostics and send a screenshot.
• In the app’s system settings CTRL+,, find “HTTP/2” and enable “Disable HTTP/2”, then restart Cursor - did it help?
• Open the Indexing tab: is the status “green” or are there errors? Screenshot, please. Try a new empty project/small subfolder - does the freeze persist?
• Are you using SSH/dev containers/WSL? If yes, check locally - does the behavior change?
• Open Help > Toggle Developer Tools and send errors from Console during the freeze.
• Additionally, if there are more stuck requests, send their Request ID.

Note: Some Windows users reported that disabling MPO helped (community solution, use at your own risk) The Cursor IDE freezes at the "planning next moves" stage - #46 by NegativeAL. Let us know if any of this helps.