A tool stopped working after connecting

It worked before governance and now returns an error. Almost always one of four things.

No provider key — error 424

The tool is in managed API key mode and there is no matching key. Claude Code needs an Anthropic key; Cursor and Copilot need OpenAI.

Fix it on Providers, or move that tool to subscription mode in Policy → Connection modes.

Ambiguous provider key — error 409

Two keys of the same type both list the requested model in their enabled models. Sentilai will not guess which one to bill. Make the model lists disjoint.

Cursor needs its model selected

After connecting Cursor, open its Settings → Models, make sure the OpenAI key is enabled and a gpt-… model is chosen. Otherwise Cursor quietly uses its own models and chat may behave oddly.

Copilot BYOK is not enabled on your GitHub organization

If VS Code does not offer a Custom Endpoint option at all, that is a GitHub organization setting. Sentilai cannot enable it.

It is a policy block, not an error

Check Activity and filter by outcome Blocked. A request stopped by your own policy is not a malfunction. The Signals column names the rule that stopped it.