hello - i clicked the csf upgrade option i received this morning, and now csf has stopped loading in webmin browser window.
csf CLI works fine.
it appears the problem is in the new csf.js file, i reported it here:
workaround from csf forum reply:
In the meantime, try setting STYLE_CUSTOM = "0" in /etc/csf/csf.conf as that should disable the themes interference with the UI.
Thank you edwardsmarkf - this worked for me after CSF upgraded to 11.05.
i am on 11.05 and i still see this error. changing the STYLE_CUSTOM to zero gets around it.
the error seems to be in /extensions/csf/csf.min.js - and when i pretty-print it, it shows at line 280:
, O = $('pre:contains("csf:")').text().match(/((?:(\d+).)?(?:(\d+).)?(*|\d+))$/) || "9.xx";
the end of it is highlighted:  || "9.xx";
 || "9.xx";
edit: added it here: https://github.com/qooob/authentic-theme/issues/900
I get the blank page (loading) when I try and access CSF. If I change my theme from Authentic to Virtualmin Framed Theme it loads properly.
This must have occurred when the Authentic theme updated. I am currently on 18.49-9 and the problem still exists (I think it was happening on the previous version.)
Thanks for that link since it clarifies the situation.
I force installed the latest beta of the Authentic Theme and now it works.
According to https://github.com/qooob/authentic-theme/issues/900 updating the theme to any new version should solver the issue.
This problem was solved with newest theme and webmin virtualmin updates at our BOX. ;)