Suddenly it's not possible to register for a training.
I get the message This training is not excisting anymore or you can not register anymore ( training is in the "future"
I believe there is something wrong with your settings. Maybe you set cut off date of the event to a past date ? Or the event date is a past date?
You can submit a support ticket sending us super admin account and the link to the event page. I am going to check and tell you exactly reason of the error