Here is what I did. clicked Statistics > Overview > Top 10 Countries> then the arrow icon, and I get the error.
Yes, the problem is with just the countries page.
In the Statistics menu, I have:
Overview, Browsers, Hits, Online, Pages, Referrers, Searches, Search Words, Top Visitors Today, Visitors, Optimization, Settings, Donate and Manual. I do not have the link to click for Top 10 Countries there.
And yes, I can view all other pages. I really love this plugin but would be nice to view the list of visitors country-wise as well.