I also ran into this problem after accepting the update. I'm not sure if this is the right approach, but he solved this problem for me.
In build.gradle (Project), I replaced it with the following:
classpath 'com.android.tools.build:gradle:1.5.0'
And in build.gradle (Module: app),
buildToolsVersion '23.0.1'
After which I synchronized the project with Gradle files. After that, everything worked well, I hope this helps you.
Emzor source share