continuum/feedback.action gives 404 error

click the URL on the user validation email and get the 404 error
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HTTP ERROR: 404

There is no Action mapped for namespace / and action name feedback. Check if there is such an action name with such namespace defined in the xwork.xml and also if such an action class exists. Check also the log to see if the action class is successfully loaded.

RequestURI=/continuum/feedback.action

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