Multiple dex files define Lorg/apache/cordova/BuildHelper

Question

I\'m in trouble since yesterday. In my internship I faced the following build error, but I couldn\'t understand why :

$ cordova build android

[...]

FAILURE         


        

Answer 1

With my Ionic 3 project it was enough to run:

ionic cordova plugin rm cordova-plugin-compat --force
ionic cordova plugin add cordova-plugin-compat@1.2

And then run a build again. No need to remove and add the platform.