After ugrading to DNN9, the HTML Editor manager no longer works.

Receive the following error:

HTTP Error 404.0 - Not found

Detail Error information:

Module:IIS Web Core

Notification:MapRequestHandler

Handler:StaticFile

Error Code:0x80070002

Requested URL:http://egenpc.lingit.no:80/Host/HTMLEditorManager?...

Physical Path:C:\websider\egenpc.lingit.no\Host\HTMLEditorManager

Logon Method: Forms

Logon User:host

Any tips?

Regards
Ingeborg Hope