webalizer -authentic theme - monthly links broken?

When viewing a webalizer report in authentic theme, clicking on the monthly dates to view details of the month goes no where. Link in address bar changes to

“https://:domain.com:10000/webalizer/usage_201801.html/?xnavigation=1”

But the right browser frame doesn’t change. Continuing to click on month dates yields the links just being added onto the current address bar like below.

“…webalizer/usage_201801.html/usage_201712.html/usage_201801.html/usage_201712.html/usage_201708.html/usage_201706.html/?xnavigation=1”

If I go to generate report and click view reports from that page, all the monthly links work fine, right frame changes to the monthly details.

Links/reports work fine in virtualmin framed theme. Anyone else? Or should I change to awstats? Which one are most people using?

Ubuntu 14.04
Virtualmin version 6.02-2 Pro
Webmin version 1.872