Unity - a problem with the sprite editor?

Question

Unity

Hello. Lord help me solve the problem. I install unity (version 2019.2.6 f1) on Windows 7, the fact is that the sprite editor stops working after the second launch of unity, an alert comes out:
although it is actually installed, if you look in the Package Manager. I reinstalled the program, deleted the sprite editor itself, did "Reset Packages to defaults", but nothing helps.
Sprite Editor works only when you first start a new project, when you launch it again, as I wrote above, it stops working. These are the errors that appear in the console:
Maybe someone already had such a problem, how to defeat her? Thank you all in advance.

Answer 1

written in black and gray. Open package manager and add .