Possible bug - webmin module not installing

[Brook]

On a clean CentOS 7.5 install, after installing CSF, going to:

Webmin > Webmin Configuration > Webmin Modules >
From local file > /usr/local/csf/csfwebmin.tgz > Install Module

Just hangs after clicking the Install Module button.

I've even tried uninstalling CSF, reinstalling, then trying again - but I get the same thing.

Any ideas what might be going on?

(CSF is in testing mode - does that matter?)

[Brook]

There were a bunch of theme errors - and I remembered that I had to change theme's previously to get it installed! Changed theme, installed and then back again!

Here are the errors for ref - lots and lots of these:

<code>
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
Use of uninitialized value $settings{"settings_sysinfo_real_time_statu"...} in string eq at /usr/libexec/webmin/authentic-theme/stats.cgi line 25.
</code>

Not sure if this is an issue with your module, or an issue with Webmin.. have reported it to them too.