Warnings in animation part

hi , im new to unity and im trying to create a project for university. Unfortunately, the professor uses an old source for teaching. The source is Getting Started with Unity 5 by [Dr. Edward Lavieri], The resource develops game of the little farmer.
There is a resource file in the book , i downloaded it and import it to unity 2022. and i get warnings in animation part, indeed me and my classmates have no idea how to fix it. Is it related to the version of unity which we have installed or do we need to do any settings to solve it?

*if i need to do any changes in blender, i will be thankful if you link a video or tutorial, since i havent done any thing in blender i dont know what should i do :melting_face:. i just imported the animation which was available in the resource file of book :face_with_head_bandage: