webmin and csf

hello - when i try to visit the csf option using webmin, i now see the following:

Error - Missing Headers

the command line works fine:

csf --version ; csf: v9.09 (generic) i tried logging out and logging back in with no success.

any suggestions?

edit:

nothing of interest in tail /var/webmin/miniserv.error

Operating system CentOS Linux 7.2.1511
Webmin version 1.801
Virtualmin version 5.03
Theme version Authentic Theme 18.02
Time on system Thursday, July 7, 2016 9:59 AM
Kernel and CPU Linux 3.10.0-327.22.2.el7.x86_64 on x86_64
Processor information Intel Core i7 9xx (Nehalem Class Core i7), 1 cores

Missing headers usually means the module isn’t running at all. Has it been installed correctly? (mostly this just means is it looking for Perl in the right place?

Note, I don’t actually know anything about the CSF module as I’ve never used it. But, that’s a common cause of missing headers. If it’s looking for perl in /usr/local/bin/perl, and perl is really in /usr/bin/perl, for example, it’ll fail to run at all, which will lead to a missing headers error from Webmin.