This is seriously dragging. Please fix this. I can not work as the error kepts stopping me.
Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal]
(Request ID: ddeaddce-6a27-4d4b-8d28-2a6b8f82e429)
same problem!!!
Same issue, can’t really work properly
Same here, task is blocked!
Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal]
(Request ID: 56408ee9-2c33-4008-9c30-653115844dad)
Over two months have passed since this problem was reported on July 31st. At this point, it’s difficult for us to believe this is a genuine oversight. Is the cursor unwilling to fix this?
@deanrie so yeah, the agent’s terminals (in both the dedicated window and right-side panel) - started defaulting to C:\users\user and ends up searching for package.json in that dir.
When it runs some npm commands (e.g. build) - it can result in some specific terminal crash that hangs the cursor agent and makes it unrecoverable.
I added a rule for the agent to change the dir and remind him of it often - then the problem DOES NOT HAPPEN - but the terminals tend to default back to the NONWORKING directory and ends up crashing sooner-or-later.
It is twice-bad as its unrecoverable (cant restart/continue the conversation once the terminal hangs), so the context of that discussion is gone, have to restart.
Thanks for the info, I’ll pass it to the team.
Can we get an update on this issue?
Downgrading worked for me.
Request ID: 0ea7b8a7-1a0d-4cbd-b84d-ca2e3b7d0860
ConnectError: [internal] Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools
at vscode-file://vscode-app/c:/Users/claud/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7347:369901|
same problem here
Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools
Same issue
Cursor IDE
Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal]
I tried http 1.2 too still same problem and i am not using vpn it started happening when i updated my cursor to latest version
Give it a prompt and let it work and do edits and after few edits it will happen
Windows 10/11
Version: 1.7.39 (user setup)
VSCode Version: 1.99.3
Commit: a9c77ceae65b77ff772d6adfe05f24d8ebcb2790
Date: 2025-10-08T00:33:20.352Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100
Yes - Cursor is unusable
Same here. Totally unusable at the moment:
Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal]
Same error with no VPN is being used.
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools
I have the latest version updated. The one before that does the same. I am on trial period and this really makes me decide if I wanna really continue or not with my subscription . Windows 11 Pro with 1gb internet over ethernet. While doing editing all of a sudden it disconnects itself and gives me this error…
Hey, thanks everyone. Could you also share the request ID with privacy mode disabled?
Cursor IDE
Connection failed. If the problem persists, please check your internet connection or VPN
I cant write again and if i restart cursor it works but same issue again. I did not change anything when this started. Tried delete all chats, im not going to try uninstall cursor to loose all my settings.
Every time i ask it to do something it starts for 5-15 sec and then i get this error: Connection failed. If the problem persists, please check your internet connection or VPN
continue working
Windows 10/11
cursor version 1.7.43
sonnet 4.5 thinking
Request ID: 5f501541-c6cb-4ff5-b282-0f708067dfd6
Im not working behind a vpn, im working from home and all other apps on computer works fine
Yes - Cursor is unusable
if i try click try again: Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal]
(Request ID: 2007d506-3500-4c9a-8ae7-2742c7412970)
I’m also facing the Serialization error, and I’ve just updated cursor AI to v1.7.40.
Request ID: 75ca44e0-4bfb-47d5-97c0-9b0edc8d238c
ConnectError: [internal] Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools
at vscode-file://vscode-app/c:/Users/Aldemar/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7347:369901
Confirming I’m also having this issue:
Connection failed. If the problem persists, please check your internet connection or VPN Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal] (Request ID: 74db7cb6-d277-4013-8d67-1a12fe638bdc)
Request ID: 414f5d6c-0cae-41ca-a7fe-27b157b4800c
ConnectError: [internal] Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools
at vscode-file://vscode-app/c:/Users/_redacted_/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7349:369901
All diagnostics were are:
Chiming in with the same error. Is Cursor genuinely trying to fix this?
If this is a billing issue as others suggested, maybe replace this cryptic message with a more transparent view of usage stats?
Connection failed. If the problem persists, please check your internet connection or VPN
Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools [internal]
(Request ID: 86b5a03e-4154-42b1-9755-6d348d9e1d4d)
