Change Cloud Platform applications have been updated to remove TLS 1.1, which has reached end-of-life. TLS 1.2 is now the default on all environments.
Fix The link to claim a New Relic account on an environment’s configuration page was displaying a 404NotFound status. For information on configuring New Relic performance monitoring for an environment, see Claiming your New Relic APM Pro account.
Cloud Platform - September 6, 2020 | Acquia Product Documentation
Cloud Platform