Thanks for the detailed report and the request ID. The fact that Composer 2.5 works fine but Opus 4.7 doesn’t is a helpful data point.
A few things that would help us narrow this down:
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Run Network Diagnostics: Cursor Settings > Network > Run Diagnostics, then share the results here as a screenshot
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Disable HTTP/2: Open Settings (
Ctrl+,), search for “HTTP/2”, turn on Disable HTTP/2, then fully quit and restart Cursor (not just Reload Window). Test Plan Build with Opus 4.7 again and let us know if it helps -
New Request ID: After trying the steps above, if the issue still happens, copy the Request ID from the failing request (three-dot menu in chat > Copy Request ID) and share it here. The original ID you shared (
0d1536d2-b622-4447-aecc-eb674daae62a) didn’t surface in our logs, so a fresh one from a failed Build attempt would be very helpful
You can also find related reports in this thread where other users found some of these workarounds helpful.