Hello!
Did you see the errors that appeared when you migrated the project to the new version of Unity?
I use Unity 2018.3.0f2.
Here is a link to Google Drive, in it the errors that I found in the project.
https://drive.google.com/open?id=1yKnPl6AMtWbNPRstfMhsJt5iQ8WKN72p
I bought this starter pack and encountered a number of problems.
There are bugs that appeared on the new version of UNITY.If the author of this pack will update it for the possibility of his work in 2019 would be very grateful.
If in this topic there is a person who was engaged in solving problems, code refactoring please forward the corrected scripts to me in the mail: stalk21@yandex.ru