Display error without graphics tablet Cintiq 13HD

[Giacomo5FF9]

The problem is the following: After installing Catalina as an operating system and the new Adobe Suite, working on Photoshop with the Cintiq 13HD graphic tablet I have no problem (photo 1), but as soon as I unplug the tablet the display becomes like this (as in photo 2); the Photoshop screen is divided into 4 parts that always show me the same part of the open image and, among other things, all 4 images move independently when I move around the workspace.
I am attaching some photos of the features of my Mac and the settings of the graphics tablet.