Endless was originally a stream-only visual album on Apple Music. When the album was finally available for purchase (for a limited 24 hours in 2018 via the Blonded store), fans scrambled to rip the audio. Many early rips were done using screen-recording software that produced fragmented MP4 files. When users tried to convert these rips into ZIP containers (to share the tracklist as single files), the encoding was often faulty, leading to header corruption.
If you want, I can write a longer dive into technical steps for repacking ZIP archives and repairing video containers, or draft a forum-ready explanation for fans explaining what an “Endless ZIP fix” does. Which would you like?
This is the most reliable method for fixing slightly damaged headers in audio archives.
Many older zip files are ripped from the original compressed livestream rather than the 2018 high-quality CD/Vinyl "CDQ" remaster. How to Fix Your Endless Zip