heya, glad you found me and hello. so gonna need some more information. like the follow-up response asked (mobile or desktop)? Are you getting any specific errors?
i will say the most common issue that i've seen is for desktop. If you didn't notice, the file is compressed which means it needs unzipped or extracted before you can play it. this keeps the download smaller. Windows has a built in extractor or you can use 3rd party apps like 7zip to unpack it.