Unsolved Error

Library\PackageCache\com.unity.cinemachine@2.3.3\Runtime\Behaviours\CinemachineStoryboard.cs(68,32): error CS0234: The type or namespace name 'UI' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?)
What is the problem, and how to solve it?

 

Update Cinemachine (and all the other packages that need to be updated) in the Package Manager.

 

How to do this?

 

https://forum.unity.com/threads/unity-package-manager-introduction-faq.528142/

 

Thank you! I will try and then answer you.

 

It worked!! thank you very much

 

A new error appeared for me.

 

That's the whole code.

 

Please open a new thread for a new issue, thanks. And please don't post screenshots, instead post the actual code, using Code tags, and the exact error text with the line number as it shows in the code that you post, so we can identify which line is throwing the error.