i have the same problem, does anyone have a solution?  

You need to provide much more information. What do you do; what happens when you do it; what doesn't happen that you expected to happen? Are there any error messages? What do they say?

Does the standalone Player app work? Is the ARIA Audio Unit/VST loaded in Finale, but empty? 

Are you using the latest version:
https://makemusic.zendesk.com/hc/en-us/articles/4548377288599-ARIA-Player-version-2-001-Apple-Silicon-Native-

Hi Fabrizio, The solution I came up with was to delete and re-install Finale 27. That did it. Good luck. John

hello, I downloaded the finale program and Garritan anthology. when playing the music with the sounds of Garritan some instruments do not sound. after a few minutes other instruments stop playing as well.

I'm sorry that I can't be of more help. You should contact MakeMusic Finale Support directly. I did find this article that may be of help: https://makemusic.zendesk.com/hc/en-us/articles/217674648--The-requested-virtual-instrument-plugin-could-not-be-found-error-with-Garritan-Instruments-for-Finale

Good luck!

John