Elements are not added to the screen, Android Studio, what should I do?

Question

Android

I started to study Android, I ran into such a problem: I created a project, and, for example, I want to add a button or something else, but I can’t drag anything. I can only add an element via XML. What to do?

Answer 1

I can not drag anything, but more specifically? Is there any error displayed? Problem with Rendering or something else? Try to reinstall/update the studio.