Update - This issue has since been resolved and the ability to add new push certificates is restored.
Our developers are currently aware of an issue with creating the push certificates for Apple devices when setting up Deep Freeze MDM. The team is working on addressing this issue and we will be providing updates as soon as more information is available.
This issue should only affect customers attempting to setup a new MDM deployment - existing push certificates should not be impacted.
If you are running into this issue please contact Faronics Support (firstname.lastname@example.org) so a support ticket can be opened on your behalf.