[Plugin: Weather and Time] Error code: Error In API

Your plug-in looks great and I’m really excited to install it on one of my clients’ website. I’m getting the following Error Code after installation and setup:

Error In API

Any idea why I’m receiving the error and what I can do about it?

Thanks,

Nita

http://ww.wp.xz.cn/extend/plugins/weather-and-time/