I can't compile a project from the older version in the new one...

Hello, I'm starting out with Unity and I've been looking for the best tool to develop cross-platform mobile games.. I started a tutorial (https://learn.unity.com/tutorial/building-for-mobile#5c7f8528edbc2a002053b4a2) and it was working fine with Unity 2018 version since that was the one I had. But once I updated to the latest 2019 version, I wasn't able to compile/play the game any more.

What's wrong?!

Thanks!

 

Tutorials for beginners are suitable for version, which are made for.
Unless you got already some programming experience, you shouldn't move to new version.
It is risk of breaking stuff, as Unity evolves their architecture.

However, error log shows you information, what is wrong.