Running Android Studio 2.2.3, if I attempt to run a program, I am told my aidl is missing. I have read through the other questions, but I am only seeing posts from 2015.

I attempt to follow the instructions and downgrade my "Compile Sdk Version" and then downgrade my "Build Tools Version." However, I am not given any other comile sdk version options other than 7.1.1 Nougat. Build tools versions only offers me 25.0.1 or 25.0.2.

The error code is below. I am new to this, I know a bit of Java and just wanted to explore a bit. But I've search for an hour and a half how to solve this. Maybe I am just dumb. Any help would be very appreciated.