SSL certs and macOS 10.11
macOS 10.11 El Capitan is no longer updated and does not support LetsEncrypt SSL certificates.
These certificates are used by a large number of websites including YoYotta.
Your YoYotta v3 license will continue to work with macOS 10.11, however you will not be able to log in to manage licences.
Please follow the instructions below to enable access to the YoYotta websites used for licensing and support
However it would be best to upgrade your Mac to the newest macOS, ideally Monterey or newer.
Which macOS does my Mac support?