Android Studio 3.5.2 Project Build Problem Because Of "multiple Dex Files Define"

I recently took over work on an Android Studio project whose active development was stopped 18 months ago, in July 2018. I have been able to build a debug version of the product, b

Solution 1:

Try the following :

Add this block of code in your build.gradle file

dexOptions {
preDexLibraries = false
}

Then clean and rebuild your project.