This is not the correct place to ask, this is a Visio forum.
I get the same message from the IP address and a Server Not Found from the URL, so maybe the server is temporarily down or the website address has changed.
Hi,
I notice this thread has been posted in Visio 2010 forum but the question is not related.
Regarding this issue, I suggest you switch to a new browse to check if the issue persists, if no and the issue is with Internet Explorer, please post the question in the Internet Explorer forum:
https://social.technet.microsoft.com/Forums/ie/en-US/home?forum=ieitprocurrentver
Regards,
Melon Chen
TechNet Community Su