I've rolled out Webmin 1.894 for all repos. This mostly is to address some more Ubuntu 18.04 networking problems, but because there have been a handful of Webmin fixes that affect some Virtualmin users since the last Webmin release and it'll be another week or two before the next stable release, I went ahead and rolled it for everyone.
Changes since 1.890:
I'm back to doing test installs on Ubuntu 18.04, and hopefully we'll be ready to call it "supported" soon.
As always, let us know if you run into problems.