aperture 3.5.1 can not upload and buy an album.

That is the second post with this problem today, see this thread, Jürgen:

Unable to Order Book from Aperture

Some things to check:

• Are all photos in the book printable? Otherwise it cannot be uploaded. Check the preview of the book: http://support.apple.com/kb/HT1040 If your book contains a corrupted image file and the preview cannot be rendered, you may receive misleading error messages, when you try to order the book.
• Are you ordering from the correct store? Make sure, the "region" settings in the System Preferences "Language&Region" are set to the country you are in, and where your AppleID and credit card are valid.
• If there is a problem with your AppleID and services have been disabled for security reasons, you may get similar error messages - try, if you can buy a free item from the iTunes Store or the AppStore, to check, if your AppleID is working. If there is a problem, reenter your address and credit card details at https://appleid.apple.com/cgi-bin/WebObjects/MyAppleId.woa/

And if there really should be a connection problem:

This error can be caused by timeouts - either due to too much traffic on Apple's severs, or firewalls or antivirus software interfering, or incompatible third party software installed, or simply the Energy Server kicking in too early. Try to temporarily disabling firewalls like Little Snitch, antivirus software, and the Energy Saver in the System Preferences.

Check the system status at Apple's page: http://www.apple.com/support/systemstatus/

I had the same problem with my new Mac Pro. I tried many of the options suggested on these forums without success.

Then I uninstalled Aperture entirely using MacKeeper and reinstall Aperture through AppStore, and the problem is now gone.

Then I uninstalled Aperture entirely using MacKeeper and reinstall Aperture through AppStore, and the problem is now gone.

The App Store version of Aperture does not need an uninstaller. Just trash the Application and download it again from the AppStore. You certainly don't need MacKeeper for this.