Wayland is a new protocol that replaces X.org in Ubuntu from 17.10 and newer versions. Wayland does not support Java yet and because of that, it doesn't support Dinamica EGO either. To continue using Dinamica EGO with distributions that support Wayland by default, users must log in their sessions using the Xorg option. On the login screen, there is a little cogwheel next to the login button. If you click that cogwheel, you will be able to select Ubuntu on Xorg instead of Wayland.