What can be done to make the project work?

Question

Android

Hello, I decided to connect appodeal. I did everything in order, everything was fine, but at some point the whole project was "overgrown" with errors. In build.gradle, in the manifest, etc. jar files of advertisers imported (not shoved into the libs folder, but imported). Below are screenshots, tell me what could be the problem (except for curvature)

Answer 1

Did you write a version in build.gradle that you don't have yet? :) For example, the studio itself suggests replacing with newer versions by alt-enter)

Answer 2

Install Repository and sync project.