Lack of memory on your graphical card is the the reason if getting a pop-up message stating "DeviceRemoved". Basically it means your graphical card on the computer is not powerful enough to run the Ecdesign layout in 3D.
Be sure to check our hardware and software requirements to learn more about what specifications are recommended.
A tip when creating a layout with many windows is to use the 3,4 or 5 panel windows instead as each window is considered an object and takes up memory.This may help you start the scene in 3D despite not meeting the harware specifications.