My cursor chat stopped working saying: Connection failed. If the problem persists, please check your internet connection or VPN
unable to get local issuer certificate [internal].
Steps to Reproduce
I have Cursor on 2 macbooks and both show network error: unable to get local issuer certificate [internal]
I think update might also not fix this as its a network related issue! This shows a very specific circular reference error in the SSL certificate chain, which is causing JSON serialization to fail for API, Ping, Chat, and Agent connections.
Immediate Fix
This is probably a corporate certificate issue. Try this solution: