Just look at it and please,help me...

After installing any assets from Asset Store, i have 30 Standard Assets errors (30 per any asset installed).
I downloaded one asset now and… probably you’ll know the rest.

Link to my YT video in which you can see this with your eyes

Some screenshots for those who don’t want to go on YouTube for some reason:

I believe that “pro only” in the errors mean that those functions are only available for Pro users.
Pro users have many bonuses and you can look at them here: Powerful 2D, 3D, VR, and AR software for cross-platform development of games and mobile apps.
Delete the asset as it has some pro only features.
And please, do not be so angry and don’t swear on the answers/forums. I’ve had many problems for my scripts and I haven’t gone mad looking for the solution.