Hey, I keep on having this error in the App Store for about two weeks while trying to purchase or update an app.
" There was an error in the App Store. Please try again later. (13) "
So here I am trying again later for like two weeks and it just don't seem to work.... does it have a solution?
Go to ~/Library/Caches/com.apple.appstore
Move the Cache.db file from the com.apple.appstore folder to the Trash.
Restart your Mac.
~ (Tilde) represents your Home folder
For Lion v10.7 To find the Home folder in OS X Lion, open the Finder, hold the Option key, and choose Go > Library
Retrieving data ...