WARNING: /home/*****/public_html/piwik/core/Db/Adapter/Mysqli.php(105): Warning - in_array() expects parameter 2 to be array, null given - Piwik 2.15.0 - Please report this message in the Piwik forums: http://forum.piwik.org (please do a search first as it might have been reported already)
how to sole the problem?