Check whether the credential was revoked, expired, or belongs to a different team or project. Personal keys also depend on their owner's current membership. Reinstating a member does not automatically restore a key already revoked.
Confirm the selected API and required credential type before replacing anything. A project key, team key, and client token are not interchangeable. Report the HTTP status, safe error code, request reference, and time to support. Never paste the key itself into a conversation or screenshot, even if it no longer works.