There was an error in the App Store. Please try again later. (undefined)

Tried everything, from having my credit cards checked to setup another account...
and finally sent Apple an e-mail asking for help.

have you tried my solution above?

It worked on four different accounts

It is nothing locally, it looks like the app is pointing to wrong download link on certain pages

It looks like my problem is still a little deeper, in the iTunes account. In one specific account, I don't get my billing info verified after I try to update or purchase a new "free" app. As well as I cannot reset the account notifications...
In another test purpose account everything works like clockwork...
It's my ****** account which has been appleducted...
But yes, you are right about some broken links in the app stores... have noticed that myself, but there's always a way around them.
Tks from China...

From what you described it looks like corrupted database affecting some accounts only

Perhaps at Akamai.net or Apple?

one can just hope no purchase history was lost (or compromised) in the process

I finally got this to work as well. Apparently it definitely matters which link you hit in the store to get a successful download. The app I wanted happened to work under the "top charts" link, then in the listing on the right hand side of the page. The app store is obviously still very buggy and not flushed out yet. If you "hold it like this," then it works.

I received the same error when trying to buy Call of Duty from an advertisement link in the App Store. When I searched for the game under categories I was able to buy the game without a problem.

Same issue here. I have tried all suggested solutions with no success. The difference is that I am NOT able to buy whatever link I click. (sorry about my poor english)

Message was edited by: TiagoPedreschi

Same here. No solution worked for me.

FishComputer wrote:
Quit MAS, go to iTunes, sign out, quit iTunes, open MAS, try again

This worked for me!

I am having the same problems. I tried different links in the MAS, signing out and in, restarting etc. Nothing solved the problem. I still always get:

'Im App Store ist ein Fehler aufgetreten. Bitte versuchen Sie es zu einem späteren Zeitpunkt erneut. (undefined)'

Any further hints?

Sebastian

Got this working but for me it required a combination of the two methods mentioned on here. Firstly Quit MAS, go to iTunes, sign out, quit iTunes, open MAS, try again. And then secondly, search for the app and click the small buy link next to the icon name - featured items would not work even after the iTunes account log-out.

I am having this problem too. I've updated software, nothing is working.

HELP This is extremely frustrating Apple, fix your programs.

Ok Finally got it to work by signing out of iTunes quitting then signing out of MAS quitting reopening signing in again searching and hitting buy on the little icon.

Regardless, it is still extremely annoying and Apple needs to take care of this glitch pronto.

Message was edited by: ospeacexo

Get worse and worse
Now I get an NSinternalcontroller.... error

MAS has been victim of its own success .... AKAMAI up to scratch this time

And Apple veil of secrecy all around it