You have not accepted the license agreements of the following SDK components

PS C:\Users\joe\AppData\Local\Android\Sdk\tools\bin> ./sdkmanager.bat --licenses

Accept? (y/N): y

y

y

y

y

y

All SDK package licenses accepted

and...

No cached version of com.android.tools.build

Uncheck "Offline work" in Android Studio 

File->Settings->Gradle->Global Gradle Settings