Syntax Highlighter not working correctly

Hi
I use Syntax Highlighter since a couple years, but suddenly several readers of my blog cannot copy the code I insert in my posts.I didn’t make any changes since I installed it.

You can try on this article http://goo.gl/9pasj5 to see if you can copy the code.

Can someone give me some help?

Thanks in advance.

https://ww.wp.xz.cn/plugins/crayon-syntax-highlighter/