Unable to find single git submodule

I have a project structured like:

build.gradle and settings.gradle

LauncerCore, LauncherUICore, MinecraftCore are other repo’s added as git submodules.
The main project relies of these three, what I want to do is build them then use them to compile the main project however when attempting to build the project I get https://gist.github.com/disconsented/19515c682fd242a6a952. After removing just LauncherUICore it will continue to build (but fail due to it missing). LauncherUICore also relies on LauncherCore like the main project.

Any ideas on how to resolve this?

I’m an idiot. Capitalization was wrong.