I have been using the following URL for the past 3 years without issue. However, it has stopped returning results.

URL:
<https://query.yahooapis.com/v1/public/yql?q=select> \* from yahoo.finance.xchange where pair in ("ARSARS")&env=store://datatables.org/alltableswithkeys

Now returns the following:

```
<?xml version="1.0" encoding="UTF-8"?>
<query xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" yahoo:count="0" yahoo:created="2017-11-02T09:33:25Z" yahoo:lang="en-AU">
    <results/>
</query><!-- total: 9 -->

```

Notice how there are no results, it simply has the tag "results".  

I have tried on this many different computers and browsers. I have also tried changing the currency combinations, but no luck.

Can anybody spot what I am doing wrong?