@Hinge I checked into it a bit, since it’s been a while since I’ve done anything Unity‑related for VRC, and I realized what’s causing the issue. When I download my own files from Google Drive, they show up as ".unitypackage.gz" instead of just ".unitypackage" for some reason?
That ".gz" part means Google Drive is adding an extra compression layer, and Unity can’t decompress it properly, which is why you’re getting that error. If you rename the file from ".unitypackage.gz" to ".unitypackage" (or download manually rather than zip), it should import normally.
Let me know if that fixes it.