Sorry, an error occurred and we were unable to resolve it.
I'm happy to hear the items in question are no longer providing you this error. For now I'll mark this as answered for tracking purposes. If you find this occur with another asset, please post back here and I'll be happy to take another look and see what may be occurring.
answered Sep 09 '16 at 08:22 PM
The error was not limited to a single market place item as it involved at least:
Somehow, after some exchanges with technical support (including screenshots), a few days and dozens of attempts on both the Launcher & website, it finally worked: I was able to buy the Sci Fi Adventure Library.
I don't know if this is correlated, but the problem occurred while the item was on sale.
Follow this question
Once you sign in you will be able to subscribe for any updates here