The “Claim account” button remaining visible, along with the “Claim your Bïrch account to continue using Conversions API Gateway” message after clicking it, is a visual issue on Meta’s side.
You can access your gateway after clicking the button by navigating to the Hub section in Bïrch: https://app.bir.ch/hub
Please reach out to our team via chat or at support@bir.ch if you have any questions!