cannot delete requester in requester list

cannot delete requester in requester list

I'm getting the following error when trying to delete a user in the requester list:

HTTP Status 400 - Invalid path /http://helpdesk.one-k.com/SearchRequester was requested

type Status report

message Invalid path /http://helpdesk.one-k.com/SearchRequester was requested

description The request sent by the client was syntactically incorrect (Invalid path /http://helpdesk.one-k.com/SearchRequester was requested).