We are using DNN 4.05.00. When I click Edit Text to edit any text module, the text editor shows the contents in HTML rather than rendering the HTML, regardless of whether Basic Text Box or Rich Text Editor is selected and regardless of whether Text, HTML, or Raw is selected.

Also, when Rich Text Editor is selected, no formatting toolbars are displayed.

I have confirmed the problem in several different browsers. We have been using DNN for years and this problem just started today.

Ideas on how to resolve this?