Error message received on Newly installed Android Studio 2.3.2? See below.

I just opened an instructable tutorial on " How To: Create an Android App With Android Studio to Control LED " and with a new install of Android Studio. I ran the build (make project) but I received this error message below:
Error:A problem occurred configuring project ':app'. > failed to find Build Tools revision 21.1.2

Can you help me solve this error message as I am finding very little on the internet concerning this particular error message. Thanks David Lee