The error I get, after installing the JDK and adding the environment path, is:
Error: Failed to start bundletool program.
This is displayed at the bottom of the Android export menu, but it's out of view and invisible until you scroll down to view it. I'm now attempting to add the 'C:\Program Files (x86)\The Game Creators\AppGameKit Studio\media\data\android' folder to the environment path list where the bundletool exists (bundletool.jar)...
Edit: Nope, didn't work. Still getting the error. Perhaps the project location is an issue there. Guess I'm stuck until the cause can be found.
Edit X2: Nope again. Changing the location of the project to Studio's \media\Projects folder also didn't get it to work.