Whilst trying to carry out a simple search in NEM, the icon spins and eventually, the following error message appears:
Sys.WebFroms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to REsponse.Write response filters HttpModules or server trace is enabled
Clear the browser cache. Once cleared, closed down the browser completely, open it back up and attempt to log in again and search.