I'm using Nintex for SP 2016 and current Chrome browser for a responsive form. I have a Rich Text Box control with text, a table, and references in it, but when I try to make changes to the control, the configuration panel is blank.
If it makes any difference, the RTB is nested in a Panel control and the control shows up fine in a published form.
The control as it shows in the Nintex Forms Designer:
When I try to edit the control, it's blank:
I've tried closing and re-opening the form, closing and re-opening the browser, and clearing the browser cache. Anything else I should try?