Failed to use ScalaPB Tutorial

[V R]

Hi everyone,

I am new to ScalaPB and started by using the tutorial by downloading the project from github: https://scalapb.github.io/docs/getting-started.

I managed to generate the codes after sbt compile in:

target/scala-2.13/src_managed/main/scalapb/com/example/tutorial/addressbook

but I got errors with the main code as on the figure:

My main question is how to use the generated codes (case classes for each message)  obtained after compiling since they are in ..\target\scala-2.13\src_managed\main\scalapb\tutorial\addressbook\

Also, in the codes from github, there is no tutorial package in /scr/main/scala/: I tried to refactor and create a tutorial package as 

\basic\src\main\scala\tutorial\AddressBookMain.scala but I got the same errors: Person and AddressBook are not found.

Coud someone help me with those please, I am really stuck with this (I use IntelliJ IDEA)

Thank you very much,

Best regards.

Maia