This happened on a system running Ubuntu 12.04.5 LTS when updating from Virtualmin 5.04 to 5.05 using
apt-get update && apt-get dist-upgrade:
Setting up webmin-virtual-server (5.05.gpl) ...
virtual-server/postinstall.pl failed : virtual-server::module_install failed : No PHP versions found for mode mod_php at web-lib-funcs.pl line 1427.
Seems like something broke there, since there is already another bug report about PHP issues when updating from 5.04 to 5.05.
Should I worry about this error message? Is there anything important happening in
postinstall.pl that now didn't take place?