Market Quote return error without any Clearification

Developer API
1 
	$url = "https://api.upstox.com/v2/market-quote/quotes?instrument_key=".urlencode($symbol);
	
	$ch = curl_init($url);
	$headers = array(
		'Accept: application/json',
		'Api-Version: 2.0',
		'Authorization: Bearer ' . $accessToken
	);

	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
	
	$resp = curl_exec($ch);
	
	curl_close($ch);

Here is part of my php method to get full market quote of any instruments. Somedays ago it was perfect. Today its returning error without any description below is response I’m getting.

{"status":"error","errors":[]}

2

Thank you for getting in touch. Could you assist by providing the precise curl request, including the instrument key, for analysis?