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Describe the Bug

500 (Internal Server Error)
2012-2ed79ce8df67e366.js:1 Failed to fetch background composers: Error: cannot decode message aiserver.v1.ListBackgroundComposersResponse from JSON: key “error” is unknown
at Object.readMessage (?client_id=client_01…X2TT7SPVP4K:1:15662)
at push.61837.K.makeMessageType.a.fromJson (?client_id=client_01…X2TT7SPVP4K:1:28774)

2012-2ed79ce8df67e366.js:1 Failed to fetch background composers: Error: cannot decode message aiserver.v1.ListBackgroundComposersResponse from JSON: key “error” is unknown
at Object.readMessage (?client_id=client_01…X2TT7SPVP4K:1:15662)
at push.61837.K.makeMessageType.a.fromJson (?client_id=client_01…X2TT7SPVP4K:1:28774)

Steps to Reproduce

Cleared browser cache.

Tried incognito mode.

Tried a different browser.

Disabled VPN, ad blockers and extensions that might interfere.

Tested on another network (home Wi-Fi, mobile data).

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.1.7 (Universal)
VSCode Version: 1.96.2
Commit: 7111807980fa9c93aedd455ffa44b682c0dc1350
Date: 2025-07-01T07:26:06.233Z (2 days ago)
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin arm64 23.3.0

Does this stop you from using Cursor

Yes - Cursor is unusable