When I import the Standard Assets package, I get errors

When I import the Standard Assets package, I get these errors:

  • CheckConsistency: gameObject does not reference component [Component]. Fixing
  • error CS0619: ‘GUITexture’ is obsolete: ‘GUITexture has been removed. Use UI.Image instead’
  • And lots of other vehicle warnings

All the script classes can also not be found.
I am using the most up-to-date version of Unity. Does anyone know how to fix this problem?

problem fixed here : Unity Standard Assets 2020 | Fixing standard assets error - YouTube