Could not find method google() f

Now you will probably get this error if you haven’t upgraded the gradle library in the gradle-wrapper.properties file.
Could not find method google() for arguments [] on repository container.

So, let’s replace this line in the gradle-wrapper.properties

distributionUrl=https://services.gradle.org/distributions/gradle-2.14.1-all.zip

with this line

distributionUrl=https://services.gradle.org/distributions/gradle-4.1-all.zip

Then do a clean and rebuild, everything should work now.