Unable to resolve dependency in Android Studio

Question

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:29.0.3.

Answer 1

It happens because com.android.support.appcompat-v7.29.x.x doesn't exist ,
the last version of the support library is 7.28.x.x
and if you want to solve this issue then you must use 7.28 and below , or migrate to androidX Library , androidx is the new support library that Google reccomend , it's better than old appcompact library .