DNS verification was successful, but "Provision certificate" gives the error: "certificate parameter is required when updating an existing certificate"

Site: steady-heliotrope-f0e8e3.netlify.app
Custom domain: face-art-zuerich.ch
DNS verification was successful, but “Provision certificate” gives the error: “certificate parameter is required when updating an existing certificate”. Could you please reset the stale SSL/certificate state for this domain?