This puzzle need an updated client.
If you want to play you need close client, open it and allow to download latest update.
Addendum to Rav3n_pl's notes:
Even if your client is the latest version, it might be a good idea to close the program and re-load it before trying to load this puzzle. (When I loaded this puzzle for the first time after loading another puzzle first, Foldit crashed. But the puzzle loaded successfully the second time upon restarting the program.)
You can load old save, but you can not share it to group.
Only new saves can be shared.
When you will try share old save client will crash.
the protein is flipping and turning and changing score when I hit the align protein to density button. I have not flipped or spun the protein as yet. Is this expected behaviour?
If you are using the normal align (Not the refined align), then yes - the normal align tries to do some guesswork to figure out roughly where the major pieces go before doing a refined align to finish up. However, on some puzzles, it doesn't work so well. This one is a problem because the 4 parallel helices can "roughly" fit the density in many different ways, and it's having trouble finding the right one. So this is why it's flipping the protein; it just thinks it's better the other way around (even if that's wrong).