Download Missing Project Template?

I just created a new 2D project with the 2D template selected. When I opened up the project, an error message popped up and it said “com.unity.template.2D” was not found. So I tried again, this time the project loaded up but I realized a lot of essential 2D components, like Canvas, are “disabled in Package Manager”. I tried looking for Package Manager under Windows but I couldn’t find anything. Why do I have this error? Why doesn’t Unity have the project template set up properly for the project?

Maybe you need the latest version of Unity.