Cloud agent environment setup is failing with 400 error – Bug Reports – Cursor
Where does the bug appear (feature/product)?
Background Agent (GitHub, Slack, Web, Linear)
Describe the Bug
Whe I try to setup my Cursor agent environment in web, I get error 400 error
Steps to Reproduce
start a new agent chat
prompts you to setup environment
At save environment step, I click “Save to team” and I get “Failed to save: 400” error
Screenshots / Screen Recordings
Operating System
MacOS
Version Information
Claude web agents
Does this stop you from using Cursor
Yes – Cursor is unusable
Hi @Muhammed_Altinci I’m sorry for the inconvenience here. This is a known class of bug and we have linked your report to it.
This may be happening because your repo has a .cursor/environment.json file that points Cloud Agents to an old or expired environment snapshot. That file takes priority over the team environment saved in setup, so saving a fresh team environment may keep failing until the file is removed or updated.
Please try this workaround:
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Open your repository locally.
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Check whether
.cursor/environment.jsonexists. -
If your team is not intentionally using this file for a custom Cloud Agent setup, delete it.
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If your team does need this file, edit it and remove the stale snapshot reference instead.
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Push that change to the branch Cloud Agents is using.
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Go back to Cloud Agent setup and run setup again.
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Once setup completes, click Save to team again.
After the stale .cursor/environment.json reference is removed, Cloud Agents should use the newly saved team environment instead of the expired snapshot.