No Data for USD

I have the free version of this plugin (thank you) and it was working great on MysticDrift.com and Gottalovebeads.com But for the last month or so I cannot update the exchange rate. When I try it always returns the message No Data for USD. It doesn’t matter which service I try to use and I tried a different currency and it couldn’t find it either.

https://www.ads-software.com/plugins/woocommerce-currency-switcher/