Gradle sync issue : None of the consumable configurations have attributes

Question

I wan't to use an external library in my project. The fact is that it doesn't behave as I want, so I need to edit classes of it.

To do this, I downloaded the library as a zip folder and added it to my project using this technique How do you edit a dependency/external library in android studio?

After the project sync, I get this in gradle console:

And here is the detail of one of those errors :

Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve project :libs:Markwon.

Could not resolve project :libs:Markwon. Required by: project :app Unable to find a matching configuration of project :libs:Markwon: None of the consumable configurations have attributes.

I tried lot of things, like setting same buildTypes names in app build.gradle and external library build.gradle like said in threads I found about this problem. I tried with another library and result was the same.

I really don't get it guys, if you have an idea about this problem, or another solution to edit my external library, I would appreciate so much.

Answer 1

(This text was moved from the question as per Jonathan Landrum's request)

After hours of hair pulling I found it. The problem was basically that my library project A was composed of 3 sub projects B, C and D

So initially I was trying to include the main library folder this way and compile it all

include ':libs:A' 

in settings.gradle and compile it like this

implementation project(':libs:A')

in build.gradle

So the good solution was

implementation project(':libs:A:B')

as the B project was the actual library I needed.