I am trying to add HtmlTextBox to my report. After double clicking on the HtmlTextBox, instead of opening the html editor, an error message appears (0dCthJrV8O.png).
And after that it is not possible to delete any element of the report (see screenshot Telerik.ReportDesigner.Net_t7UHZP4wr4.png).
Also, after closing the editor, another error appears (see screenshot IpCUql4RY4.png).
Version: 16.2.22.1109