Version 2.6 17 No Longer Downloads Quotes

[Robert L. Kief]

For the past couple of weeks, GnuCash 2.6.17 no longer downloads stock 
quotes.  The accompanying error message originally listed the stocks 
quotes being requested with the indication they couldn't be downloaded.  
Now the error reads "There was an unknown error while retrieving the 
price quotes.".  Are there any suggestion on how I can return to 
receiving quotes?

Thank you,

Robert L.. Kief