Hello, Aletered-Ego!
Here is my sollution:
- Boot into Ubuntu.
- At the login screen, click the gear icon next to your username.
- Select “Budgie Desktop” from the list of desktop environments.
- Log in to your account.
If this does not work, you may need to reinstall the Budgie desktop environment. To do this, open a terminal window and run the following command:
sudo apt install budgie-desktop
Once the Budgie desktop environment is reinstalled, reboot your computer and you should be able to log in to the Budgie desktop environment by default.