Where does the bug appear (feature/product)? Background Agent (GitHub, Slack, Web, Linear) Describe the Bug Unable to view a cloud agent web page, seeing a generic “Something went wrong” page. In the dev tools console, I see lots of the following errors: My problem URL is https://cursor.com/agents…

Hey, this is a known bug. The same ToolResult.toJson error is affecting several users right now. The team is aware. While we’re waiting on a fix, here are a couple things that might help: Try a different model. Based on reports in this thread , 5.3 Codex doesn’t trigger this error. Which model wer…

Cloud agents crash -

Support Bug Reports

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Error when opening cloud agent thread on cursor.com Help cloud-agents	2	72	March 12, 2026
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Cloud agents crash -

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