The Professional DNN
provider of RadEditor that comes with the DNN 5.x.x.-6.x.x installations, is implementated by DotNetNuke
developers and it is not supported by Telerik.
My suggestion is to post the question about how to configure RadEditor in the DNN forums
. For example in this one: Taming (customizing) The new Telerik RadEditor
All the best,
the Telerik team
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