I had the same error, the full download I had was corrupted.

After a few attempts of re-downloading, I managed to get an uncorrupted download. You can tell when you have about 1900 files inside CardSprite.

Other things I did may help:

- Clear your Browser's Cache (for Google Chrome: tools -> clear browsing data) (I also deleted my download history to be sure).

- Refresh the page with the download link after clearing the Cache.

- No other internet activity while downloading.

- Wait a bit between attempts, as connection quality my also be an issue, which can fluctuate over time.

I did all this to increase the chance of no corruption while downloading.

Hopefully this helps