Often, a "zip file" is simply a collection of MP3s that someone has compiled. The most reliable way to get such a collection is to create it yourself. By downloading songs individually from the legal sources listed above, you are guaranteed clean, high-quality files, completely avoiding the issues that often plague pre-made zip files from unverified sources.
No matter the cause, the result is the same: you can't open the zip or play the songs. Often, a "zip file" is simply a collection
Instead of spending hours troubleshooting, why not use a service that works right from the start? Supporting the legal ecosystem ensures that the artists are respected and you don't have to deal with cyber-risks. you are guaranteed clean