Question Split Application Binary: Gradle 6.1.1. not installed

Hi
I am trying to split my application with an expansion pack, since it is too big to host on Google Play. When I try checking the Split Application Binary box in the player settings I get an error:
Creating asset packs require Gradle version 6.1.1 which is not installed with Unity. Provide a path to a custom Gradle version in editor "preferences" -> External Tools tab.
I went into External Tools but not sure how to execute this instruction.

I go through the whole build process and the files appear to be generated. Do I need to worry about this error message? If so how do i fix?

2019.4.21f1
Windows 11
Building for Android

thanks