Applying the Rectangle Tool is not possible with no layers selected. How to fix?

Question

Adobe Photoshop

Answer 1

Although three days have already passed, but nevertheless I will answer: you have the "Pixels" mode on the control panel, that is, the drawn vector figure in fact immediately turns out to be a raster one. In order for it to become a true vector, you need to switch to the "Shape" mode.

Answer 2

so choose a layer of some
UPD: before climbing into any program, you should read tutorials or watch a video on its basics, and not ask about every tool or phenomenon / error here

Answer 3

The question is worth exploring in more detail. It's not clear what exactly is the error.