I've rolled out Webmin version 1.791 to the repos.
Changes since 1.782:
WARNING: We've discovered just after release of this version that the System Statistics graphs in Virtualmin Pro have been broken by this release (it is a bug in the Authentic Theme); we are working on getting it resolved ASAP (hopefully within the next day or two), but if you need those graphs, you may not want to upgrade just yet. The graphs continue to work in the Virtualmin Framed Theme, so a workaround until it has been resolved it to switch to the old theme for looking at graphs. Another workaround would be to install Authentic Theme 17.54, which is the last version that does not exhibit this bug.
Apologies for the inconvenience on this one; we didn't catch the graphs bug in our testing before rolling it out...and because Virtualmin 5.01 requires the Let's Encrypt client in Webmin 1.791, it is difficult to roll back.