I have been questing during the last couple of hours with no problems, but - suddenly - I'm encountering the following error message when I click on the 'Buy' button on the Shop Search:

"Your most recent purchase failed. An unknown error occurred."

I'm using Chrome / Windows 10. I've tried buying different items, tried shutting the browser tab completely and reopening it, but I'm still getting the same problem.

Is this happening to anyone else?

EDIT: As mysteriously as the error arrived, it's now been fixed - I can use Shop Search again. PHEW. This can be locked :)