Voice acting seems not to be working - I need help!

[watashi]

As the title says, I don't hear any voice acting. I checked a walkthrough on YouTube and his version/copy works very well. I haven't installed Miniature Garden in my steam folder, don't know if this is the issue.

My options: https://steamcommunity.com/sharedfiles/filedetails/?id=1602067103

I really, really don't want to go for a refund, so I appreciate any kind of help!