All requests to the agent fail with the message taking longer than expected. Network diagnostics show many errors. I am on a company VPN but so are my co-workers who experience no such issues.
FAILED (6): DNS, SSL, Authentication UI, Cursor Tab, Agent Endpoint, Codebase Indexing
DNS: Error: No response
Logs:
[2026-03-03T23:39:20.307Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Error: Error: No response
[2026-03-03T23:39:20.308Z] Result: Error: No response
SSL: Error: No provider
API: Not run
Ping: Not run
Chat: Not run
Agent: Not run
Marketplace: Success
Logs:
[2026-03-03T23:39:20.303Z] Host: marketplace.cursorapi.com
[2026-03-03T23:39:20.397Z] Response in 94ms
[2026-03-03T23:39:20.397Z] Response: 200
[2026-03-03T23:39:20.397Z] Response Type: cors
[2026-03-03T23:39:20.397Z] Server: null
[2026-03-03T23:39:20.397Z] Result: OK in 94ms
Authentication: Success
Logs:
[2026-03-03T23:39:20.304Z] Host: prod.authentication.cursor.sh
[2026-03-03T23:39:20.646Z] Response: 200 in 342ms
Authentication UI: Error: No response from DNS lookup
Logs:
[2026-03-03T23:39:20.307Z] DNS lookup: authenticator.cursor.sh
[2026-03-03T23:39:20.307Z] Error: No response
Cursor Tab: Error: No response from DNS lookup
Logs:
[2026-03-03T23:39:20.307Z] DNS lookup: api3.cursor.sh
[2026-03-03T23:39:20.307Z] Error: No response
Agent Endpoint: Error: No response from DNS lookup
Logs:
[2026-03-03T23:39:20.307Z] DNS lookup: agent.api5.cursor.sh
[2026-03-03T23:39:20.307Z] Error: No response
Codebase Indexing: Error: No response from DNS lookup
Logs:
[2026-03-03T23:39:20.307Z] DNS lookup: repo42.cursor.sh
[2026-03-03T23:39:20.307Z] Error: No response
Downloads: Success
Logs:
[2026-03-03T23:39:20.305Z] Host: downloads.cursor.com
[2026-03-03T23:39:20.611Z] Response: 403 in 306ms
CDN: Success
Logs:
[2026-03-03T23:39:20.306Z] Host: cursor-cdn.com
[2026-03-03T23:39:20.442Z] Response: 404 in 136ms
For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)
For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…
Additional Information
Add any other context about the problem here.
Does this stop you from using Cursor?
Yes - Cursor is unusable
Sometimes - I can sometimes use Cursor
No - Cursor works, but with this issue
The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!
Hey, thanks for the detailed diagnostics. It makes troubleshooting a lot easier.
From the logs, there’s an interesting pattern. Some domains resolve fine (prod.authentication.cursor.sh, marketplace.cursorapi.com, downloads.cursor.com), but others don’t (authenticator.cursor.sh, api3.cursor.sh, agent.api5.cursor.sh, repo42.cursor.sh). Since your coworkers on the same VPN don’t have this issue, it’s likely a DNS configuration problem specific to your machine.
Can you run these commands in Command Prompt and share the output?
Compare with a coworker: Check if your DNS servers match (from the ipconfig /all output). Sometimes VPN clients assign different DNS servers per machine
If your IT team manages the VPN, it’s worth asking them to make sure *.cursor.sh, *.cursor-cdn.com, and *.cursorapi.com are whitelisted in DNS and firewall rules. Full networking docs here: Network Configuration
Thank you for the prompt reply! I actually seem to have resolved the issue the following way:
Completely uninstalling Cursor and deleting all Cursor files from my system
Downloading the latest latest version of Cursor from the main Cursor download page (2.6.11). I was previously using the download link from my user dashboard in the web app, and for whatever reason that was only giving my 2.5.26.
The only issue I’m having now is incredibly slow go-to-reference/go-to-definition behavior. I get this spinning wheel “finding references” in the status bar, which, if I click, pulls up a notification window that says “Finding references, source: Python”. This takes about 30-60 seconds even when the object I’ve ctrl+clicked on is a constant that only gets used once in the same file in which its defined.
Request ID: 67cc6724-861d-43f6-9296-0f18b63fb1ad
{"error":"ERROR_TIMEOUT","details":{"title":"Request timed out.","detail":"Timeout waiting for next item.","additionalInfo":{},"buttons":[],"planChoices":[]},"isExpected":true}
[deadline_exceeded] Error
die: [deadline_exceeded] Error
at n5A (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34249:23755)
at e5A (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34249:22658)
at l5A (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34250:6285)
at _ou.run (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34250:10400)
at async vOa.runAgentLoop (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46813:9906)
at async I3u.streamFromAgentBackend (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46867:9277)
at async I3u.getAgentStreamResponse (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:46867:13639)
at async bMe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34310:17597)
at async nc (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:45792:4828)
Thanks for the info. These are two separate problems, so let’s go through them.
Chats hanging / timeout
Since diagnostics are clean now but chats still hang, try this:
Check if it works without the VPN. This will help confirm which side the issue is on.
Finding references / Pyright
I see you already opened a separate Pyright topic here: Cursor Pyright exceedingly slow. Let’s continue there. The Jedi workaround you found is the most reliable option for now. We’ll look into what’s going on with Cursor Pyright.
