Just installed EndeavourOS from scratch, booted and logged in fine. Installed the deepin and deepin-extra groups, and adjusted lightdm to use the deepin greeter.
Rebooted, all good and I see the deepin greeter ready to login in. Login, and I get just a white screen with a cursor.
I found a thread in RebornOS that suggested this was an issue with the deepin-wm-chooser process, but was only showing in virtualbox environments. Any idea on what I could do to resolve this?