I've rolled out Virtualmin virtual servers module version 5.01 for all repos. It should be appearing in the software updates section of the system information dashboard in Virtualmin, or in apt or yum from the command line.
Changes since 5.0:
The biggest change is the changes in Let's Encrypt to use the built in Let's Encrypt client in the new Webmin 1.791 release (which also has been released and added to the Virtualmin repos). This removes a lot of the complexity of making use of Let's Encrypt (on some operating systems, especially older ones, it was particularly challenging to install the standard Let's Encrypt client, because of a very large number of very recent dependencies). The new client has very few dependencies (as with all things that ship in the Webmin package), and should Just Work on any Virtualmin system. It also adds most of the features that have been requested for Let's Encrypt in our ticket tracker and forums.
As always, let us know if you run into any problems with the new version.