When your store's categories can't be loaded, we now tell you WHY. Until now the category picker showed the same message for almost every problem — "UNAS did not respond in time" — even when the store had actually rejected the key, when you had used up your hourly request allowance, or when the store itself was having trouble. That left neither you nor us any clue about what to fix. From now on you see the store's own message (for example, that the key isn't allowed to run this query), and we say so separately when the only issue is too many requests within an hour — in that case waiting a little is enough. On Shoprenter, two cases that used to look identical are now told apart: a wrong store identifier (it only needs the store's short name, not the full web address) no longer looks as though your store doesn't exist.
