Audio files are unplayable after being uploaded to iCloud drive

Hey there. I have a number of audio files (.aif and .wav) for music production projects that I can no longer open on my Macbook. I see the files in Finder but can't seem to open them with any application. There's no cloud icon next to the files indicating that they're remote. They all have pretty reasonable file sizes (~50MB, not 1KB or something like that). Furthermore, I can play the files when I visit https://www.icloud.com/iclouddrive/, so I know they exist in an uncorrupted state. I just can't open them locally on my computer and there's no indication to me that they aren't downloaded.

Please help! Happy to give more info about things I've tried.