Where does the bug appear (feature/product)?
Cursor IDE
Describe the Bug
cursor IDE is not responding on chat messages, tried to run network diagnosis, everything is red for HTTP/2, HTTP/1.1 and HTTP/1.
Steps to Reproduce
n/a
Screenshots / Screen Recordings
Operating System
MacOS
Current Cursor Version (Menu → About Cursor → Copy)
Version: 1.7.52 (Universal)
VSCode Version: 1.99.3
Commit: 9675251a06b1314d50ff34b0cbe5109b78f848c0
Date: 2025-10-17T01:41:03.967Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 22.1.0
For AI issues: which model did you use?
Auto
Does this stop you from using Cursor
Yes - Cursor is unusable
Hey, thanks for the report! This looks like a DNS resolution failure, your system can’t resolve api2.cursor.sh to an IP address.
Please check:
- Are you on a corporate network, using a VPN, or running firewall/antivirus software? These often block external API domains
- Can you test DNS resolution? Open Terminal and run:
nslookup api2.cursor.sh
Please share the output
Quick fixes:
-
Switch DNS to Google/Cloudflare:
- System Preferences → Network → Advanced → DNS
- Add
8.8.8.8 or 1.1.1.1
- Click OK, then restart Cursor
-
Temporarily disable VPN/firewall to see if they’re blocking Cursor
-
Check if your ISP/network is blocking the domain, some corporate or regional networks restrict specific domains
Let me know the nslookup results and your network setup (corporate/home/VPN) so we can keep troubleshooting.
Woow, lifesaver. This worked for me! Also why is it always a DNS issue 
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