Since a few days I receive the following error "Could not create widget BootstrapRTE.widget.BootstrapRTE: Error: Invalid template:" when I try to edit an email template in the module "E-mail module with templates" (https://appstore.home.mendix.com/link/app/259/Mendix/E-mail-module-with-templates). In the past it worked fine and I was able to create & edit templates.
As far as I can see it is a problem in the add-on "Bootstrap Wysiwyg Editor" (https://appstore.home.mendix.com/link/app/902/Mendix/Bootstrap-Wysiwyg-Editor).
Does anyone have the same problem? And how do you fix it?
Modeler: 6.7.1 Browser: Chrome 53.0.2785.143 m (64-bit) on Windows 10. But had the same problem with Chrome on MacOS.