If any users are currently using old versions of Certify please note that Let’s Encrypt will discontinue their v1 API from June and you must be using a recent version of Certify The Web to remain compatible.
You will already have been notified multiple times via your Let’s Encrypt account email address.
We estimate that about 1% of existing Certify users are affected by this and those users need to upgrade immediately.
All users are encourage to stay up to date with the current version of the software as only the latest version is officially supported.