I\'m facing this issue since yesterday... I am adding:
//Add Library
compile \'com.android.support:design:26.1.0\'
compile \'com.firebaseui:firebase-ui:0.2.0\'
c
compile 'com.firebaseui:firebase-ui-auth:2.3.0'
When your FirebasuUi Version is 2.3.0, your Firebase/Play Services Version must be 11.0.4
Your Library
//Add Library
compile 'com.android.support:design:26.1.0' //--->Same to your buildToolVersion
compile 'com.firebaseui:firebase-ui:0.2.0' //--->2.3.0
compile 'com.google.android.gms:play-services-auth:11.2.2' //--->11.0.4
compile 'com.google.firebase:firebase-auth:11.2.2' //--->11.0.4
Note
Until now, the latest buildToolVersion is 26.0.2 .