The KWSN stats services have been discontinued. Sorry if you were still using them but the code was completely unmaintained and in order to support as many BOINC projects as there are these days I would have had to put some major effort into reviving things and also upgrading the server hardware. And at this point there are others who have far surpassed my efforts in stats and cross-project account managers and other goodies that I can't really hope to keep up with any more. So when the bill for the KWSN server came due again this year we decided to move to a much cheaper cloud server and retire the statistics.
Keep those shrubbers shrubbing. BOINC forever!