admin/environment/custom check/ssl/tls configuration not supported
From MoodleDocs
No PHP/cURL extension with TLSv1.2 support has been detected. Some services may not work. It is strongly recommended to upgrade your TLS libraries.
Note: You are currently viewing documentation for Moodle 3.1. Up-to-date documentation for the latest stable version of Moodle is probably available here: admin/environment/custom check/ssl/tls configuration not supported.
No PHP/cURL extension with TLSv1.2 support has been detected. Some services may not work. It is strongly recommended to upgrade your TLS libraries.