AI features completely unusable (Stuck, Timeouts) - Quota being consumed for nothing

[David_Linhares]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I can no longer use the AI features. No matter what prompt I send, the agent takes minutes to respond, if it responds at all. It constantly gets stuck on messages like “planning next moves” or “waiting for extension host”.

It started to happen after I bought a new laptop (I made a clean install of Windows, didnt install VPN or any network service)

The most frustrating part is that my usage/credits are being consumed without me being able to actually get any work done. To make matters worse, there seems to be zero active technical support to help resolve this. It feels like Cursor doesn’t care much about support.

Here is what I’ve already tried:

Clean reinstall (wiping every single Cursor-related folder I could find on my machine)

Logging out and logging back in (both desktop and browser)

Deleting old sessions

Forcing HTTP/1.1

Begging every possible AI out there for a fix

Modifying machineId values in the .json config files

Installing C++ redistributables

Installing standard VSCode

Uninstalling antivirus

Disabled Windows Update with WUB

Additionally, the agent often just randomly cancels the procedure while I’m in the middle of reading its output.

My environment: Windows 11 Pro 25H2 - 26200.8037 - experience: 1000.26100.300.0

Steps to Reproduce

You only have to TRY to use it. Any prompt.

Expected Behavior

You’ll probably lose an entire week of work getting frustrated trying to solve a problem with zero total success.

Screenshots / Screen Recordings

log console cursor.txt (126 KB)

Operating System

Windows 10/11

Version Information

Version: 2.4.27 (system setup) - this was my last try, but also the latest was bad.
VSCode Version: 1.105.1
Commit: 4f2b772756b8f609e1354b3063de282ccbe7a690
Date: 2026-01-31T21:24:58.143Z (1 mo ago)
Build Type: Stable
Release Track: Default
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

All of them

For AI issues: add Request ID with privacy disabled

Appended with additional information

Additional Information

workbench.desktop.main.js:36367 [TerminalExecutionServiceProxy] v3 health check failed after 2132ms: Error: Session 29f859af-a218-43cf-8702-a6bbabd642cd not found or has been disposed
workbench.desktop.main.js:11398 [Extension Host] [cursor-agent-exec] Sandbox helper path not found, sandboxing will be unavailable
workbench.desktop.main.js:34043 [transport] Connect error in unary AI connect ConnectError: [unauthenticated] You must be a team member to access this resource
workbench.desktop.main.js:36048 Failed to load team commands: ConnectError: [unauthenticated] You must be a team member to access this resource
workbench.desktop.main.js:58 ERR [Extension Host] [otel.error] {“message”:“Request Timeout”,“name”:“Error”}
workbench.desktop.main.js:34043 [transport] Connect error in unary AI connect ConnectError: [unknown] Network disconnected
workbench.desktop.main.js:58 ERR [Extension Host] [otel.error] {“message”:“Bad Request”,“code”:“400”,“name”:“OTLPExporterError”,“data”:“{"error":"Trace spans collection is not enabled for this user"}”}
workbench.desktop.main.js:34043 [transport] Connect error in unary AI connect ConnectError: [internal] AI connect transport unary call cancelled for aiserver.v1.ServerConfigService.getServerConfig
workbench.desktop.main.js:34043 [composer] No first token received within 2s (repeated up to 32s)
workbench.desktop.main.js:34043 [transport] [NAL client stall detector] Advisory stall detected - no activity for advisory threshold period
workbench.desktop.main.js:58 ERR A view with id ‘workbench.panel.aichat.view.[object Object]’ is already registered
workbench.desktop.main.js:34043 [transport] Agent client stream abort Error: stall_detector
workbench.desktop.main.js:34043 [transport] Stream error reported from extension host ConnectError: [internal] User requested cancellation of ai connect transport stream
workbench.desktop.main.js:34201 [DiffHashTracker] Error tracking NAL edit: Error: SQLITE_ERROR: cannot start a transaction within a transaction
workbench.desktop.main.js:34043 [composer] Client stream abort Error: submit_chat_abort_existing
workbench.desktop.main.js:34043 [transport] Agent client stream abort Error: conversation_action_abort
workbench.desktop.main.js:34043 [composer] Client stream abort Error: abort_chat_and_wait_for_finish
workbench.desktop.main.js:34043 [transport] Stream connect error in extension host
workbench.desktop.main.js:34043 [transport] Connect error in stream AI connect ConnectError: [internal] Cancellation token requested for stream

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, this is a known issue, and from the logs it matches what other users on this Windows build have reported.

The main thing that stands out is you’re on version 2.4.27 (January 31). That’s about 7 weeks behind the current stable (2.6.20+). There have been multiple fixes for streaming timeouts, stall detection, and the Planning next moves hangs since that build. You said the latest was bad too. Can you confirm exactly which version you tried? Your report shows 2.4.27.

Here’s what I’d suggest:

• Update to the latest stable: Help > Check for Updates, restart Cursor. Make sure you’re on 2.6.x.
• Run network diagnostics: Cursor Settings > Network > Run Diagnostics. Share a screenshot of the results here.
• Test in an empty folder: File > Open Folder, pick an empty directory, open a new chat, type hello. This helps rule out project-specific issues.

The [unauthenticated] You must be a team member error in your logs is harmless. It shows up for all individual Pro accounts and isn’t causing this. Same for the OTEL and SQLite errors. Those are known and not related.

The team is aware of the Planning next moves freezes. Your report helps. No ETA yet, but newer versions have improved this a lot.

About credits being consumed, if you want to request a refund or credit adjustment, email [email protected] with a description of the issue. The billing team can help.

Let me know what version you end up on after updating and what the diagnostics show.

[David_Linhares]

Thanks for replying,

About versions:

• v 2.6.19 - the one I used for all those attempts
• v 2.5.26 - the first I installed (because it was on my backup’s download folder from the other PC)
• v 2.4.27 (now) - this was my last try, it didn’t solve the longer waitings but feels more stable (at least I get some results) - and I changed to http/1.1

About Windows version: I’m all set to make a clean installation of any version you recommend to ensure Windows is not the villain - btw, I still have my older computer which runs Windows 10 (I formatted but installed the same version it was running before) and where I can install and test it if needed (don’t know why didn’t make it yet).

I will make the steps you said and come back with logs and screenshots asap.

[David_Linhares]

well, it’s a sh*t. No matter what I do. I made a clean install of Win10 22H2, then installed Cursor again, and still have to deal with prompts getting stuck. Error messages are widely different, going from “Extension host” waiting forever, to “Reconnecting”, “proxy”, “planning next moves”, etc.

my workflow is basically resumed to “prompt > wait half hour > change http > close Cursor and reopen > try again.

[deanrie]

Hey David! I can see the diagnostic screenshots, they’re really helpful.

The first one shows the main issue: the Agent crashed with the error “HTTP/1.1 SSE responses are being buffered by a proxy in your network environment”. This means something between your computer and our servers is buffering the streaming connection. Even if you don’t have a VPN installed, this can still happen at the ISP or router level.

In the second screenshot, everything passes including the Agent, but you still get stuck on “Waiting for extension host”. That makes it look like there might be two separate issues happening at the same time.

A few things to try:

1. Check on a different network. Connect your laptop to your phone’s mobile hotspot and try again. This is the fastest way to confirm it’s network-related. If it works on mobile data, the problem is likely your ISP or router.

2. Start Cursor with extensions disabled: open Terminal, run cursor --disable-extensions, then try sending a simple request. This helps rule out a broken extension blocking the extension host.

3. Try an empty folder: File > Open Folder > pick a brand new empty folder > open chat > type “hello”. Heavy workspaces can hang the extension host.

4. What version are you on right now? The screenshots mention Composer 1.5, but I want to confirm your actual Cursor version via Help > About.

The team is aware of both the SSE buffering issue and the extension host issues. I don’t have an ETA yet, but your report and diagnostics help us prioritize.

I know this is really frustrating. Let me know what happens with the hotspot test, it should clarify a lot.