I am too having this issue on all my machines running Webmin that were upgraded from csf 11.04 to 11.05. I was able to re-create this issue consistently by rolling back and forward between versions 11.05 and 11.04. Prior to v.11.05 there were no problems. Switching style customization off works, but, truly, this is a workaround. Would you please consider looking into the issue and fixing it? Thanks.
There is nothing at all that we can do. You need to speak to the theme creator to fix their theme or use our UI by disabling STYLE_CUSTOM.
This is the risk that is run when somebody decides to change our UI which we will modify at any time. We only recommend using our UI for our products to ensure they keep working.
If you are using a theme for Webmin (for example Authentic theme), you want to update your theme to the latest version.
Force the latest stable update by going to https://webminurl:webminport/webmin/edit_themes.cgi or clicking on the settings-icon next to your selected theme on the webmin homepage and at the bottom of that page you can choose to force the newest update (pick "stable").
In my case I was on Authentic theme 18.x and was having the issue with CSF not loading. After forcing the update I'm now on 19.03 and everything is working again.
In the change log of Authentic theme I found this line under version 19.02 (November 7):
"Fix to support latest version of ConfigServer Security & Firewall"
After the automatic update of csf to version 11.05 The current csf module for Webmin is no longer working and the csf configuration page no longer loads.
CSF seems to be still working it is just the configuration page accesses from within the Webmin admin panel that is not displaying .
Tested on several servers all using Debian 9 and Webmin 1860
Hi
Using the solution " In my case I was on Authentic theme 18.x and was having the issue with CSF not loading. After forcing the update I'm now on 19.03 and everything is working again " - Fixed the issue - Thank you helonaut