Richtext widget: some trouble in uninitialize function

Hello, I use the richtext widget from the app store to create a mail signature. I added it to a form and linked a text attribute to it. Now when I run this, everything looks fine Untill I press 'save', then this error appears: "RichTextwidgetSimpleRichTextEditor_0.destroy: Some trouble in uninitialize function : j is undefined. Any idea what goes wrong?
1 answers

Is this fixed in version 1.2.1? I'm using this widget with and getting this error:

RichText_widget_SimpleRichTextEditor_0.destroy : Some trouble in uninitialize function : this.getDoc() is null

Emptied my cache but still occuring. It only happens when I click the save button. Then the popup remains and you can't do anything. Only refreshing the page works.