"View Stats" button non-operational

Here is what I get:

Address bar: https://v8.prnx.net/VisitsPerDay.asp?Graph=StackedColumn3D&pn=8&user=175908...............

Page: 404 - File or directory not found.The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

Also I got a "security certificate invalid" happened with both Firefox AND Chrome browsers...