Why is the 2d sprite editor package missing in Unity?

Question

Unity

Installed several different versions of unity, 2020.1.6f1 2019.4.5f1 2019.4.11f1

On any version, when the project is first launched, everything works as it should, but as soon as you close the program and open it again (and on any subsequent launch), the 2d sprite editor disappears, when you try to click this message appears on the button "No sprite editor window registered please download 2d sprite package from package manager"



I go to the package manager - Unity registry everything is installed there.



Everything is fine in In project too.

Restarting the computer doesn't help.

If you create a new project, everything works there at first, but again, after closing and opening the program, the same problem arises, run it as much as you like, restart the program 2d sprie stops working, although the package manager shows that everything is in order, there is no install button, only remove.

When moving window - 2d - only one item out of three.



And these 2 exclamation marks in the console appear on the first start, when everything works and when it doesn’t work, they are always there, I don’t know what it is.

Help me please.