title: Empty array returned when calling AlphaVantage APIs for NSE symbols tickers
body: <p>I cannot get any NSE Symbol data from the AlphaVantage, they return always empty array. </p>
  
  <p>Query:</p>
  
  <pre><code>https://www.alphavantage.co/query?function=TIME_SERIES_INTRADAY&amp;symbol=NSE:TITAN&amp;apikey=Q134IXR7RVWU5AQL&amp;outputsize=full&amp;interval=1min  
  </code></pre>
  
  <p>Response:</p>
  
  <pre><code>{}
  </code></pre>
  
  <p>A month back the same query was returning data.
  Looks something has changed on the AlphaVantage server end recently.</p>
  
  <p>Your help is much appreciated in advance!</p>