Help with playback Ver 8.5

I created a file for a student. Usually would have done differently but have cancer and I’m not able to be in my studio. The file will not playback all the parrts and let me adjust volumes as usulal
Sweet Home.cpr (3.5 MB)

Hi,

How do you adjust the Volumes usually, please?

Sorry, I don’t own ARIA Player plug-in, so I cannot verify.

Why do you use ARIA Player MIDI Out as an Input and the very same port as an output, please? It doesn’t look healthy to me.

I’ll change it
Thanks