An old DotNetNuke (ver. 3) website had a text editor which with an error.
The error Object reference not set to an instance of an object was showing when using the text editor.
There was no error when using the text editor with the default American language set, either by the user account, or within the browser.
The error was shown to be caused by a missing language in the text editor directory
To resolve the error, the American English file en-US.xml was copied and renamed to en-GB.xml.
The languages for the Standard DotNetNuke text editor are to be found in the directory /Providers/HtmlEditorProviders/Ftb3HtmlEditorProvider/ftb3/Languages.
