The "HomeRunner AI Concierge: multiple consecutive AI requests have failed" admin notice does not expire on a timer. It clears automatically the first time the AI Concierge completes a successful response.
How to clear it. Fix the underlying problem, which is usually an OpenRouter credit or API key issue. Once that is fixed, send any message to the concierge on your site, and the banner is removed. The X dismiss button only hides the notice for that page view.
If the banner keeps coming back. AI requests are still failing. Check that your OpenRouter account has credit and, if your key has a monthly spending limit, that the limit is not exhausted.