Error message
When this error occurs
The authorization flow exists and belongs to you, but no authorization code has been parked on it yet. The external authorization server redirects the user’s browser toGET /mcp-connections/callback with the code, and that request is
what stores it. Completing before the callback has arrived — because the consent screen is still open, or the user closed
it without approving — has nothing to exchange.
How to fix
Finish the consent step at the external authorization server, then complete again. If the consent screen was dismissed, callPOST /mcp-connections for a fresh authorize URL and start over; authorization flows are short-lived, so a stale
one expires rather than waiting indefinitely.